Monadnock Building
Encyclopedia
The Monadnock Building is a skyscraper located at 53 West Jackson Boulevard in the south Loop
Chicago Loop
The Loop or Chicago Loop is one of 77 officially designated Chicago community areas located in the City of Chicago, Illinois. It is the historic commercial center of downtown Chicago...

 community area of Chicago
Chicago
Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

, Illinois
Illinois
Illinois is the fifth-most populous state of the United States of America, and is often noted for being a microcosm of the entire country. With Chicago in the northeast, small industrial cities and great agricultural productivity in central and northern Illinois, and natural resources like coal,...

. The north half of the building was designed by the firm of Burnham & Root and built in 1891. The tallest commercial load-bearing masonry
Masonry
Masonry is the building of structures from individual units laid in and bound together by mortar; the term masonry can also refer to the units themselves. The common materials of masonry construction are brick, stone, marble, granite, travertine, limestone; concrete block, glass block, stucco, and...

 building ever constructed, it employed the first portal system of wind bracing in America. Its decorative staircases represent the first use of aluminum in building construction. The south half, constructed in 1893, was designed by by Holabird & Roche
Holabird & Roche
The architectural firm of Holabird & Root was founded in Chicago in 1880. Over the years, the firm's designs have changed many times — from the Chicago School to Art Deco to Modern Architecture to Sustainable Architecture.-History:...

 and is similar in color and profile to the original, but the design is more traditionally ornate. When completed, it was the largest office building in the world. The success of the building was the catalyst for an important new business center at the southern end of the Loop.

The building was remodelled in 1938 in one of the first major skyscraper renovations ever undertaken—a bid, in part, to revolutionize how building maintenance was done and halt the demolition of Chicago's aging skyscrapers. It was sold in 1979 to owners who restored the building to its original condition, in one of the most comprehensive skyscraper restorations attempted as of 1992. The project was recognized as one of the top restoration projects in the country by the National Trust for Historic Preservation
National Trust for Historic Preservation
The National Trust for Historic Preservation is an American member-supported organization that was founded in 1949 by congressional charter to support preservation of historic buildings and neighborhoods through a range of programs and activities, including the publication of Preservation...

 in 1987. The building is divided into offices from 250 square feet (23.2 m²) to 6000 square feet (557.4 m²) in size, and primarily serves independent professional firms. It was listed for sale in 2007.

The north half is an unornamented vertical mass of purple-brown brick, flaring gently out at the base and top, with vertically continuous bay windows projecting out. The south half is vertically divided by brickwork at the base and rises to a large copper cornice
Cornice
Cornice molding is generally any horizontal decorative molding that crowns any building or furniture element: the cornice over a door or window, for instance, or the cornice around the edge of a pedestal. A simple cornice may be formed just with a crown molding.The function of the projecting...

 at the roof. Projecting window bay
Bay (architecture)
A bay is a unit of form in architecture. This unit is defined as the zone between the outer edges of an engaged column, pilaster, or post; or within a window frame, doorframe, or vertical 'bas relief' wall form.-Defining elements:...

s in both halves allow large exposures of glass, giving the building an open appearance despite its mass. The Monadnock is part of the Printing House Row District
Printing House Row District
The Printing House Row District is a U.S. historic district on the 500 through 800 blocks of South Dearborn, South Federal and South Plymouth Streets in the Loop community area of Chicago, IL...

, which also includes the Fisher Building
Fisher Building
The Fisher Building is an ornate Art Deco skyscraper located on the corner of West Grand Boulevard and Second Avenue in the heart of the New Center area of Detroit, Michigan. It is constructed of limestone, granite, and several types of marble, and was financed by the Fisher family with proceeds...

, the Manhattan Building, and the Old Colony Building
Old Colony Building (Chicago)
The Old Colony Building is 17-story landmark building in the Chicago Loop community area of Chicago, Illinois. Designed by the architectural firm Holabird & Roche in 1893-94, it stood at approximately 215 feet and was the tallest building in Chicago at the time it was built...

.

When it was built, many critics called the building too extreme, and lacking in style. Others found in its lack of ornamentation the natural extension of its commercial purpose and an expression of modern business life. Early 20th century European architects found inspiration in its attention to purpose and functional expression. It was one of the first buildings named a Chicago Architectural Landmark
Chicago Landmark
Chicago Landmark is a designation of the Mayor of Chicago and the Chicago City Council for historic buildings and other sites in Chicago, Illinois, United States. Listed sites are selected after meeting a combination of criteria, including historical, economic, architectural, artistic, cultural,...

 in 1958. It was added to the National Register of Historic Places
National Register of Historic Places
The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

 in 1970, and named as part of the National Historic Landmark
National Historic Landmark
A National Historic Landmark is a building, site, structure, object, or district, that is officially recognized by the United States government for its historical significance...

 South Dearborn Street–Printing House Row North Historic District in 1976. Modern critics have called it a "classic", a "triumph of unified design", and "one of the most exciting aesthetic experiences America's commercial architecture has produced".

North half (1881–1891)

The Monadnock was commissioned by Boston real estate developers Peter and Shepherd Brooks in the building boom following the Depression of 1873–79
Long Depression
The Long Depression was a worldwide economic crisis, felt most heavily in Europe and the United States, which had been experiencing strong economic growth fueled by the Second Industrial Revolution in the decade following the American Civil War. At the time, the episode was labeled the Great...

. The Brooks family, which had amassed a fortune in the shipping insurance business and had been investing in Chicago real estate since 1863, had retained Chicago property manager Owen F. Aldis to manage the construction of the seven-story Grannis Block on Dearborn Street in 1880. It was Aldis, one of two men Louis Sullivan
Louis Sullivan
Louis Henri Sullivan was an American architect, and has been called the "father of skyscrapers" and "father of modernism" He is considered by many as the creator of the modern skyscraper, was an influential architect and critic of the Chicago School, was a mentor to Frank Lloyd Wright, and an...

 credited with being "responsible for the modern office building", who convinced investors like the Brooks brothers to build new skyscrapers in Chicago. By the end of the century, Aldis would create over 1000000 sqft of new office space and manage nearly one fifth of the office space in the Loop.

Daniel Burnham
Daniel Burnham
Daniel Hudson Burnham, FAIA was an American architect and urban planner. He was the Director of Works for the World's Columbian Exposition in Chicago. He took a leading role in the creation of master plans for the development of a number of cities, including Chicago and downtown Washington DC...

 and John Wellborn Root
John Wellborn Root
John Wellborn Root was an American architect who worked out of Chicago with Daniel Burnham. He was one of the founders of the Chicago School style...

 met as young draftsmen in the Chicago firm of Carter, Drake, and Wight in 1872 and left to form Burnham & Root the following year. At Aldis's urging, the Brooks brothers had retained the then-fledgling firm to design the Grannis Block, which was their first major commission. Burnham and Root would become the architects of choice for the Brooks family, for whom they would complete the first high-rise building in Chicago, the 10-story Montauk Building
Montauk Building
The Montauk Building - also often referred to as Montauk Block - was a high-rise building in Chicago, Illinois.Designed by John Wellborn Root Sr. and Daniel Burnham, it was built in 1882–1883, and was demolished in 1902...

, in 1883, and the 11-story Rookery Building
Rookery Building
The Rookery Building is a historic landmark located in the Loop community area of Chicago in Cook County, Illinois, United States. Completed by John Wellborn Root and Daniel Burnham of Burnham and Root in 1888, it is considered one of their masterpiece buildings. It once housed the office of the...

 in 1888.

The Great Chicago Fire
Great Chicago Fire
The Great Chicago Fire was a conflagration that burned from Sunday, October 8, to early Tuesday, October 10, 1871, killing hundreds and destroying about in Chicago, Illinois. Though the fire was one of the largest U.S...

 of 1871 had decimated a 4 miles (6.4 km) by 0.5 mile (0.80467 km) swath of the city between the Chicago River and Lake Michigan
Lake Michigan
Lake Michigan is one of the five Great Lakes of North America and the only one located entirely within the United States. It is the second largest of the Great Lakes by volume and the third largest by surface area, after Lake Superior and Lake Huron...

, and subsequent commercial development expanded into the area far south of the main business district along the river that would come to be known as "the Loop"
Chicago Loop
The Loop or Chicago Loop is one of 77 officially designated Chicago community areas located in the City of Chicago, Illinois. It is the historic commercial center of downtown Chicago...

. Between 1881 and 1885, Aldis bought a series of lots in the area on Peter Brooks' behalf, including a 70-by-200-foot (21 by 61 m) site on the corner of Jackson and Dearborn streets. The location was remote, yet attractive for several reasons. The construction of the Chicago Board of Trade Building
Chicago Board of Trade Building
The Chicago Board of Trade Building is a skyscraper located in :Chicago, Illinois, United States. It stands at 141 W. Jackson Boulevard at the foot of the LaSalle Street canyon, in the Loop community area in Cook County. Built in 1930 and first designated a Chicago Landmark on May 4, 1977, the...

 in 1885 had made nearby LaSalle Street
LaSalle Street
LaSalle Street is a major north-south street in Chicago named for Sieur de La Salle, an early explorer of Illinois. The portion that runs through the Loop is considered to be Chicago's financial district...

 the city's prime financial district, driving up property values, and railroad companies were buying up land further south for new terminal buildings, creating further speculation in the southeastern end of the Loop. Brooks commissioned Burnham & Root to design a building for the site in 1884, and the project was announced in 1885, with a brief trade journal notice that the building would cost $850,000 ($ in dollars). The Chicago building community had little faith in Brooks' choice of location. Architect Edwin Renwick would say:

Early sketches show a 13-story building with Ancient Egyptian ornament and a slight flaring at the top, divided visually into five sections with a lotus-blossom decorative motif. This design was never approved, as Brooks waited for the real estate market in the south Loop, still mostly warehouses, to improve. Where Root was known for the detailed ornamentation of his designs (as seen in the Rookery Building), Brooks was known for his stinginess and preference for simplicity. For the Monadnock, Brooks insisted that the architects refrain from elaborate ornamentation and produce instead "the effect of solidity and strength, or a design that will produce that effect, rather than ornament for a notable appearance." In a 1884 letter to Aldis, he wrote: While Root was on vacation, Burnham had a draftsman create a "straight up-and-down, uncompromising, unornamented facade
Facade
A facade or façade is generally one exterior side of a building, usually, but not always, the front. The word comes from the French language, literally meaning "frontage" or "face"....

." Objecting at first, Root later threw himself into the design, declaring that the heavy lines of an Egyptian pyramid had captured his imagination and that he would "throw the thing up without a single ornament".

In 1889, a new plan was announced for the building: a thick-walled brick tower, 16 stories high, devoid of ornamentation and suggestive of an Egyptian pylon
Pylon (architecture)
Pylon is the Greek term for a monumental gateway of an Egyptian temple It consists of two tapering towers, each surmounted by a cornice, joined by a less elevated section which enclosed the entrance between them. The entrance was generally about half the height of the towers...

. Brooks insisted that the building have no projections, for which reason the plan did not include bay window
Bay window
A bay window is a window space projecting outward from the main walls of a building and forming a bay in a room, either square or polygonal in plan. The angles most commonly used on the inside corners of the bay are 90, 135 and 150 degrees. Bay windows are often associated with Victorian architecture...

s, but Aldis argued that more rentable space would be created by projecting oriel window
Oriel window
Oriel windows are a form of bay window commonly found in Gothic architecture, which project from the main wall of the building but do not reach to the ground. Corbels or brackets are often used to support this kind of window. They are seen in combination with the Tudor arch. This type of window was...

s, which were included in the final design. The Monadnock's final height was calculated to be the highest economically viable for a load-bearing wall design, requiring walls 6 feet (1.8 m) thick at the bottom and 18 inches (45.7 cm) thick at the top. Greater height would have required walls of such thickness that they would have reduced the rentable space too greatly. The final height was much dithered over by the owners, but a decision was forced when the city proposed an ordinance restricting the height of buildings to 150 feet (45.7 m). To protect future income potential, Aldis sought a permit for a 16-story building immediately. The building commissioner, although "staggered by the sixteen story plan", granted the permit on June 3, 1889.
With its 17 stories (16 rentable plus an attic), its 215 feet (65.5 m) high load-bearing walls were the tallest of any commercial structure in the world. To support the towering structure and reinforce against wind, the masonry walls were braced with an interior frame of cast
Cast iron
Cast iron is derived from pig iron, and while it usually refers to gray iron, it also identifies a large group of ferrous alloys which solidify with a eutectic. The color of a fractured surface can be used to identify an alloy. White cast iron is named after its white surface when fractured, due...

 and wrought iron
Wrought iron
thumb|The [[Eiffel tower]] is constructed from [[puddle iron]], a form of wrought ironWrought iron is an iron alloy with a very low carbon...

. Root devised for this frame the first attempt at a portal system of wind bracing in America, in which iron strut
Strut
A strut is a structural component designed to resist longitudinal compression. Struts provide outwards-facing support in their lengthwise direction, which can be used to keep two other components separate, performing the opposite function of a tie...

s were riveted between the columns of the frame for reinforcement. The narrow lot allowed only a single, double-loaded corridor, which was appointed with a 3 foot (0.9144 m) high wainscot
Panelling
Panelling is a wall covering constructed from rigid or semi-rigid components. These are traditionally interlocking wood, but could be plastic or other materials....

 of white Carrara
Carrara
Carrara is a city and comune in the province of Massa-Carrara , notable for the white or blue-grey marble quarried there. It is on the Carrione River, some west-northwest of Florence....

 marble, red oak trim, and feather-chipped glass that allowed outside light to filter from the offices on each side into the hallways. Floors were covered with hand-carved marble mosaic
Mosaic
Mosaic is the art of creating images with an assemblage of small pieces of colored glass, stone, or other materials. It may be a technique of decorative art, an aspect of interior decoration, or of cultural and spiritual significance as in a cathedral...

 tiles. Skylit open staircases were made of bronze-plated cast iron on upper floors. On the ground floor, they were crafted in cast aluminum—an exotic and expensive material at the time—representing the first use of aluminum in building construction.

The building was constructed by the firm of George A. Fuller
George A. Fuller
George A. Fuller was an architect often credited as being the "inventor" of modern skyscrapers and the modern contracting system.-Early life and career:Fuller was born in Templeton, Massachusetts, near Worcester...

, who trained as an architect but made his mark as the creator of the modern contracting
General contractor
A general contractor is responsible for the day-to-day oversight of a construction site, management of vendors and trades, and communication of information to involved parties throughout the course of a building project.-Description:...

 system in building construction. His firm had supervised construction of the Rookery, and later built New York's Flatiron Building
Flatiron Building
The Flatiron Building, or Fuller Building, as it was originally called, is located at 175 Fifth Avenue in the borough of Manhattan, New York City and is considered to be a groundbreaking skyscraper. Upon completion in 1902 it was one of the tallest buildings in the city and the only skyscraper...

 with Burnham in 1902. The Monadnock Block was built as a single structure but was legally two buildings, the Monadnock and the Kearsarge, named for Mount Monadnock
Mount Monadnock
Mount Monadnock, or Grand Monadnock, is the most prominent New England mountain peak south of the White Mountains and east of the Massachusetts Berkshires, and is the highest point in Cheshire County, New Hampshire...

 and Mount Kearsage in New Hampshire. Work was completed in 1891. The Monadnock, which Root called his "Jumbo", was his last project; he died suddenly while it was under construction.

South half and early history (1891–1938)

Encouraged by the early success of the building, Shepherd Brooks purchased the 68-by-200-foot (21 by 61 m) lot adjoining to the south in 1893 for $360,000 ($ in dollars). Aldis recommended the firm of Holabird & Roche
Holabird & Roche
The architectural firm of Holabird & Root was founded in Chicago in 1880. Over the years, the firm's designs have changed many times — from the Chicago School to Art Deco to Modern Architecture to Sustainable Architecture.-History:...

, who had designed the Pontiac Building for Peter Brooks in 1891, to extend the Monadnock south to Van Buren. William Holabird
William Holabird
William Holabird was an American architect.Holabird studied at the United States Military Academy at West Point but resigned and moved to Chicago, where he later got married. He worked for William Le Baron Jenney...

 and Martin Roche
Martin Roche
Martin Roche was an American architect.In partnership with William Holabird, Martin Roche designed buildings following the Chicago School and that were landmarks in the development of early sky scrapers. He worked for William Le Baron Jenney until 1881 when he joined William Holabird at Holabird &...

 had trained together in the office of William LeBaron Jenney, and in 1881 formed their own firm, which would become one of the most prolific in the city and the acknowledged leader of the Chicago school
Chicago school (architecture)
Chicago's architecture is famous throughout the world and one style is referred to as the Chicago School. The style is also known as Commercial style. In the history of architecture, the Chicago School was a school of architects active in Chicago at the turn of the 20th century...

 of architecture. The north half had struggled with cost overruns and Holabird & Roche presented a far more cost-effective design. The design, for two buildings called the Katahdin
Mount Katahdin
Mount Katahdin is the highest mountain in Maine at . Named Katahdin by the Penobscot Indians, the term means "The Greatest Mountain". Katahdin is the centerpiece of Baxter State Park: a steep, tall mountain formed from underground magma. The flora and fauna on the mountain are typical of those...

 and Wachusett
Mount Wachusett
Mount Wachusett is located in the towns of Princeton and Westminster in Worcester County, Massachusetts. It is the highest point in Massachusetts east of the Connecticut River. The mountain is named after a Native American term meaning "near the mountain" or "mountain place". The mountain is a...

 (also named for New England
New England
New England is a region in the northeastern corner of the United States consisting of the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island, and Connecticut...

 mountains), connected them to the north half as a single structure at an estimated cost of $800,000 ($ in dollars). Construction began in 1892, under the supervision of Corydon T. Purdy who would later earn accolades as the structural engineer for many famous Chicago and New York skyscrapers.

The addition, 17 stories high, preserved the color and vertically massed profile of the original, but was more traditionally ornate in its design, with grander entranceways and more neoclassical
Neoclassical architecture
Neoclassical architecture was an architectural style produced by the neoclassical movement that began in the mid-18th century, manifested both in its details as a reaction against the Rococo style of naturalistic ornament, and in its architectural formulas as an outgrowth of some classicizing...

 touches. The building reflected in its design the transition taking place in skyscraper design from load-bearing walls to steel frame construction . The Katahdin, built first, used the same iron framed masonry construction as the original. The Wachusett was entirely steel frame
Steel frame
Steel frame usually refers to a building technique with a "skeleton frame" of vertical steel columns and horizontal -beams, constructed in a rectangular grid to support the floors, roof and walls of a building which are all attached to the frame...

d. Where the north half required great thicknesses of brick in the load-bearing walls, the addition employed only a thin facing of brick and terracotta trim, affording larger expanses of glass and faster, less expensive construction. The south half cost 15 percent less, weighed 15 percent less, and had 15 percent more rentable space than the north half. Connected on every floor except the top one and sharing a common basement, each of the four component buildings was equipped with its own heating system, elevators, stairs, and plumbing to facilitate a separate sale if required. The combined final cost in 1893 was $2.5 million ($ in dollars).

When complete, the Monadnock was the largest office building in the world, with 1,200 rooms and an occupancy of over 6,000. The Chicago Daily Tribune commented that the population of most Illinois towns in 1896 would fit comfortably in the building. It was a postal district unto itself, with four full-time carriers delivering mail six times a day, six days a week. It was the first building in Chicago wired for electricity, and one of the first to be fire-proofed, with hollow fire clay
Fire clay
Fire clay is a term applied to a range of refractory clays used in the manufacture of ceramics, especially fire brick.High grade fire clays can withstand temperatures of 1775°C , but to be referred to as a "fire clay" the material must withstand a minimum temperature of 1515°C...

 tiles lining the structure so that the metal frame would be protected even if the facing brick were to be destroyed.
The Brooks' decision to construct a building of such scale and in such an unlikely location was vindicated by the Monadnock's success—it was the most profitable investment they ever made. The Economist, a Chicago real estate journal, conceded in 1892 that: Early tenants, according to Rand McNally
Rand McNally
Rand McNally is an American publisher of maps, atlases, textbooks, and globes for travel, reference, commercial, and educational uses. It also provides online consumer street maps and directions, as well as commercial transportation routing software and mileage data...

, included "great corporations, banks, and professional men ... among them the Santa Fe
Atchison, Topeka and Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway , often abbreviated as Santa Fe, was one of the larger railroads in the United States. The company was first chartered in February 1859...

, the Michigan Central
Michigan Central Railroad
The Michigan Central Railroad was originally incorporated in 1846 to establish rail service between Detroit, Michigan and St. Joseph, Michigan. The railroad later operated in the states of Michigan, Indiana, and Illinois in the United States, and the province of Ontario in Canada...

, and the Chicago & Alton
Alton Railroad
The Alton Railroad was the final name of a railroad linking Chicago to Alton, Illinois, St. Louis, Missouri, and Kansas City, Missouri. Its predecessor, the Chicago and Alton Railroad , was purchased by the Baltimore and Ohio Railroad in 1931 and was controlled until 1942 when the Alton was...

 Railroads, and the American Exchange National and Globe Savings Banks".

In 1897, the Union Elevated Railroad Company opened the Union Loop line of the Chicago "L", the last leg of which ran immediately alongside the Van Buren side of the building. Aldis filed suit against the "L" in 1901 for $300,000 in damages ($ in dollars), complaining that: Aldis lost the case, but won on appeal, when the Supreme Court of Illinois found that owners of property abutting the "L" lines could recover damages if the property had been injured by noise, vibration, or the blocking of light, paving the way for many lawsuits to follow.

Modernization (1938–1979)

A boom in new construction after 1926 created stiff competition for older buildings like the Monadnock. Occupancy declined from 87 percent in 1929 to 55 percent in 1937 and the building began to lose money. In 1938, building manager Graham Aldis (Owen's nephew) announced what the Chicago Daily Tribune called "the city's largest and most novel modernization job" in a move toward halting the destruction of Chicago's aging skyscrapers. Rejecting the term "modernization", Aldis called his plan "progressive styling", which he believed would revolutionize the way building maintenance was done to preserve millions of dollars worth of buildings that would otherwise be destroyed. "There is no reason why", he said, "any well-designed office building need be torn down because of obsolescence." Skidmore & Owings
Skidmore, Owings and Merrill
Skidmore, Owings and Merrill LLP is an American architectural and engineering firm that was formed in Chicago in 1936 by Louis Skidmore and Nathaniel Owings; in 1939 they were joined by John O. Merrill. They opened their first branch in New York City, New York in 1937. SOM is one of the largest...

, who had pioneered functional design, were retained to lead a $125,000 program ($ in dollars) to restyle the main entrance, remodel the lobby and ground floor shops, modernize all the public spaces, and progressively modernize office suites as demand required. The modernization included covering the mosaic floors with rubber tile and terrazo
Terrazo
Terrazo is a book written in 1947 by Puerto Rican writer Abelardo Diaz Alfaro. The book won many awards, including that of the Sociedad de Periodistas Universitario y Instituto de Literatura Puertorriqueña, and made it to the national libraries of many other Latin American countries where Diaz...

, enclosing the elevators and ornamental stairways, and replacing the marble and oak finishes in the corridors and offices with modern materials. By the end of 1938, 35 new tenants had signed leases and 11 existing tenants had leased additional space in the building.

In 1966, Aldis & Co., which had managed the building for the Brooks estate for 75 years, was dissolved and the Monadnock was sold for $2 million ($ in dollars) to Sudler & Co., owners of the John Hancock Center
John Hancock Center
John Hancock Center at 875 North Michigan Avenue in the Streeterville area of Chicago, Illinois, is a 100-story, 1,127-foot tall skyscraper, constructed under the supervision of Skidmore, Owings and Merrill, with chief designer Bruce Graham and structural engineer Fazlur Khan...

, the Rookery, and the Old Colony Building
Old Colony Building (Chicago)
The Old Colony Building is 17-story landmark building in the Chicago Loop community area of Chicago, Illinois. Designed by the architectural firm Holabird & Roche in 1893-94, it stood at approximately 215 feet and was the tallest building in Chicago at the time it was built...

. The new owners again modernized the interior, installing carpet, fluorescent lights
Fluorescent lamp
A fluorescent lamp or fluorescent tube is a gas-discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short-wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light. A fluorescent lamp converts electrical power into useful...

, and new doors, and undertook a major effort to shore up the north wall which had sunk 1.75 in during construction of the Kluczynski Federal Building
Kluczynski Federal Building
The Kluczynski Federal Building is a modernist skyscraper in the downtown Chicago Loop located at 230 South Dearborn Street. The 45-story structure was designed by Ludwig Mies van der Rohe and completed in 1974 as the last portion of the new Federal Center. It is tall and stands on the site...

 across Jackson Street in 1974.

By 1977, operating expenses were high, rents were low, and occupancy had fallen to 80 percent. Struggling to make loan payments, the owners were forced to sell the building to avoid foreclosure. It was purchased by a partnership headed by William S. Donnell in 1979 for $5 per square foot ($53.82 per square meter) or approximately $2 million ($ in dollars).

Restoration and later (1979–)

The building Donnell purchased in 1979 had declined badly. The Dearborn entrances had been closed in, the ground floor had been "defaced by garish signs", and the brick had been painted and was peeling. Inside, the marble wainscoting had been painted over and many of the original oak doors had been replaced with cheaper mahogany. The decorative stair rails had been enclosed, and some stairways and corridors had been closed off completely. Much of the original mosaic tile had been demolished—some floors were carpeted, others tiled in vinyl
Vinyl
A vinyl compound is any organic compound that contains a vinyl group ,which are derivatives of ethene, CH2=CH2, with one hydrogen atom replaced with some other group...

 or terrazo. Half of the sixteen elevators were still manually operated. "It was as if it had been partly updated every ten years throughout its history", said Donnell, "it was never done over in its entirety."

Donnell, who had studied architecture at Harvard
Harvard University
Harvard University is a private Ivy League university located in Cambridge, Massachusetts, United States, established in 1636 by the Massachusetts legislature. Harvard is the oldest institution of higher learning in the United States and the first corporation chartered in the country...

, planned to gut the building and construct a new, modern office complex inside the historic shell. Failing to obtain financing for the remodeling, he embarked instead on an incremental, "pay as you go" project to restore the Monadnock to its original condition in painstaking detail. The project was, according to historian Donald Miller, the most comprehensive skyscraper restoration ever attempted at the time; it took thirteen years to complete. Working from original drawings discovered at the Art Institute of Chicago
Art Institute of Chicago
The School of the Art Institute of Chicago is one of America's largest accredited independent schools of art and design, located in the Loop in Chicago, Illinois. It is associated with the museum of the same name, and "The Art Institute of Chicago" or "Chicago Art Institute" often refers to either...

, and two old photographs, Donnell and John Vinci, one of the nation's leading preservation architects, restored the building to its condition when first constructed, before any modernizations, working piecemeal as offices became vacant.

The color of the shellac
Shellac
Shellac is a resin secreted by the female lac bug, on trees in the forests of India and Thailand. It is processed and sold as dry flakes , which are dissolved in ethyl alcohol to make liquid shellac, which is used as a brush-on colorant, food glaze and wood finish...

 was matched to closets where the wood had not been darkened by exposure to light. The mosaic floors were recreated by Italian craftsmen at a cost of $50 per square foot ($538.12 per square meter). A local firm was found that could reproduce the complicated process of sandblasting
Abrasive blasting
Abrasive blasting is the operation of forcibly propelling a stream of abrasive material against a surface under high pressure to smooth a rough surface, roughen a smooth surface, shape a surface, or remove surface contaminants. A pressurized fluid, typically air, or a centrifugal wheel is used to...

 and hide glue
Animal glue
An animal glue is an adhesive that is created by prolonged boiling of animal connective tissue.These protein colloid glues are formed through hydrolysis of the collagen from skins, bones, tendons, and other tissues, similar to gelatin. The word "collagen" itself derives from Greek κόλλα kolla, glue...

 application used to created the original feather chipped glass. This reproduced glass was used to restore the partitions and naturally lit corridors of Root's design. To recreate the doors and wood trim, Donnell purchased the firm that had created the original oak woodwork—and still used the same 19th century machinery. Perfect replicas of the original aluminum light fixtures were fabricated from early photographs and carbon filament light bulbs were obtained to recreate the original lighting effect. A single surviving aluminum staircase was discovered behind a wall, restored, and used as a model to rebuild the lobby stairways and metalwork. The wainscoting on the upper floors was restored with marble salvaged from the recently modernized, nearby 19 LaSalle and Manhattan Buildings. Marble was purchased from the same Italian quarry
Quarry
A quarry is a type of open-pit mine from which rock or minerals are extracted. Quarries are generally used for extracting building materials, such as dimension stone, construction aggregate, riprap, sand, and gravel. They are often collocated with concrete and asphalt plants due to the requirement...

 that supplied Root's original construction to restore the lobby walls and ceilings.

The Dearborn street entrances were reopened and their massive granite lintels and surrounds cleared of layers of black paint or replaced. A source was found for the molded bricks needed to repair or replace the curved corners. Large plate glass windows at the entrance were removed and replaced with double-hung window
Sash window
A sash window or hung sash window is made of one or more movable panels or "sashes" that form a frame to hold panes of glass, which are often separated from other panes by narrow muntins...

s that conformed to the original design. Fiberglass
Fiberglass
Glass fiber is a material consisting of numerous extremely fine fibers of glass.Glassmakers throughout history have experimented with glass fibers, but mass manufacture of glass fiber was only made possible with the invention of finer machine tooling...

 shades resembling the original linen
Linen
Linen is a textile made from the fibers of the flax plant, Linum usitatissimum. Linen is labor-intensive to manufacture, but when it is made into garments, it is valued for its exceptional coolness and freshness in hot weather....

 versions were installed to preserve the appearance of the facade. The average cost of the restoration work was $1 million per floor ($ in dollars) in 1989, or $47 per square foot ($505.92 per square meter).

Donnell's goal was that the Monadnock would "not only look as it originally did, it [would] also live as it used to", and he sought tenants for the street-level shops that were similar to their 19th century occupants. Shop windows were cleared of all signs and obstructions to preserve intended view from the corridor through to the street. Fluorescent lighting was prohibited and only gold leaf lettering on the glass was permitted for signage. Shops, all individually owned, were selected to fit the architectural character of the building. A florist, for example, was chosen that evoked a turn-of-the-century atmosphere, as well as a barbershop with vintage fixtures and decor. A tobacconist
Tobacconist
A tobacconist is an expert dealer in tobacco in various forms and the related accoutrements .Such accoutrements include pipes, lighters, matches, pipe cleaners, pipe tampers, ashtrays, humidification devices, hygrometers, humidors, cigar cutters, and more. Books and magazines, especially ones...

 with oak furnishings, a pen shop with glass cases, a shoe-shine stand, and other service establishments represented, in Donnell's words, "the kind of small-scale entrepreneurs who occupied those spaces at the turn of the century, the kind of people who bring vitality and life to a building because they have a stake in it."

The restoration was a success both critically and commercially. The building was 80 percent occupied when bought in 1979 and rented for $5.50 per square foot ($59.20 per square meter). By 1982, it was 91 percent occupied and commanded rent of $9 per square foot ($96.89 per square meter). The Monadnock was selected as one of top restoration projects in the country by the National Trust for Historic Preservation
National Trust for Historic Preservation
The National Trust for Historic Preservation is an American member-supported organization that was founded in 1949 by congressional charter to support preservation of historic buildings and neighborhoods through a range of programs and activities, including the publication of Preservation...

 in 1987, noting "the outstanding quality of the overall restoration effort", and the precision, detail and faithfulness of the interior restoration, in particular the lobby, which "serves as a model for preservation nationwide."

The restored Monadnock is divided into offices of from 250 square feet (23.2 m²) to 6000 square feet (557.4 m²) As of 2008, it was 98.9 percent leased; the 300 tenants are primarily independent professional firms and entrepreneurs. Rents range from $21 to $23 per square foot ($226 to $247 per square meter), plus electricity.

The building was offered for sale in 2007, with an expected price of $45 to $60 million. A tentative deal was reached at a price of $48 million in 2008.

Architecture

Together, the two parts of the building have a frontage of 420 feet (128 m) on Dearborn Street with a depth of 70 feet (21.3 m). The original northern half presents a plain, unbroken vertical mass of purple-brown brick, which is contoured to create a gentle curve at the base of the building and an outward flare to form an austere parapet
Parapet
A parapet is a wall-like barrier at the edge of a roof, terrace, balcony or other structure. Where extending above a roof, it may simply be the portion of an exterior wall that continues above the line of the roof surface, or may be a continuation of a vertical feature beneath the roof such as a...

 at the top. The gentle swelling at base and cornice, observed historian Donald Hoffman, "came very close to the bell-shaped column the Egyptians had derived from papyrus". The corners of the building are gracefully chamfer
Chamfer
A chamfer is a beveled edge connecting two surfaces. If the surfaces are at right angles, the chamfer will typically be symmetrical at 45 degrees. A fillet is the rounding off of an interior corner. A rounding of an exterior corner is called a "round" or a "radius"."Chamfer" is a term commonly...

ed as they rise to the top and the oriel windows are chamfered at their base. he floor divisions are not marked on the exterior; the unbroken edifice is interrupted only by a series of cantilever
Cantilever
A cantilever is a beam anchored at only one end. The beam carries the load to the support where it is resisted by moment and shear stress. Cantilever construction allows for overhanging structures without external bracing. Cantilevers can also be constructed with trusses or slabs.This is in...

ed window bays, separated by rows of single thin silled windows set into the vertical face. The entryways are small, single-height portals topped with plain stone lintels.

The south half preserves the lines and color of the older building, but is vertically divided by a stringcourse
Course (architecture)
A course is a continuous horizontal layer of similarly-sized building material one unit high, usually in a wall. The term is almost always used in conjunction with unit masonry such as brick, cut stone, or concrete masonry units .-Styles:...

 over the second story, emphasizing the building's base, and a large ornamental copper cornice
Cornice
Cornice molding is generally any horizontal decorative molding that crowns any building or furniture element: the cornice over a door or window, for instance, or the cornice around the edge of a pedestal. A simple cornice may be formed just with a crown molding.The function of the projecting...

 at the roof line. Massive blocks of red granite, 6 feet (1.8 m) thick, frame the large, two-story entrances. The projecting window bays of the original are repeated, but alternate in a pattern of two four-window bays to one recessed strip of windows to create the undulating appearance of the facade that was an early trademark of Holabird & Roche. Carl Condit, historian of the Chicago school, has commented that:
The Monadnock rests on the floating foundation
Floating raft system
Floating raft is type of land-based foundation that protects against settlement and the liquefaction of soft soil due to seismic activity. It was a necessary innovation in the development of tall buildings in the wet soil of Chicago in the 19th century, where it was developed by John Wellborn Root...

 system invented by Root for the Montauk Building that revolutionized the way tall buildings were built on Chicago's spongy soil. A 2 foot (0.6096 m) layer of concrete, reinforced with steel beams, forms a spread footing
Shallow foundation
A shallow foundation is a type of foundation which transfers building loads to the earth very near the surface, rather than to a subsurface layer or a range of depths as does a deep foundation...

 extending out 11 feet (3.4 m) under the surrounding streets, spreading the weight of the building over a large area of earth. The building was designed to settle 8 inches (20.3 cm), but by 1905 had settled that much and "several inches more", necessitating reconstruction of the first floor. By 1948, it had settled 20 inches (50.8 cm), resulting in a step down from the street to the ground floor. The entire east wall is supported on caisson
Caisson (engineering)
In geotechnical engineering, a caisson is a retaining, watertight structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the water can be pumped out, keeping the working...

s sunk to the hardpan
Hardpan
In soil science, agriculture and gardening, hardpan or ouklip is a general term for a dense layer of soil, usually found below the uppermost topsoil layer. There are different types of hardpan, all sharing the general characteristic of being a distinct soil layer that is largely impervious to water...

, installed when the subway Blue Line
Blue Line (Chicago Transit Authority)
The Blue Line consists of a long trunk line in the Chicago Transit Authority's rapid transit system which extends through Chicago's Loop from O'Hare International Airport at the far northwest end of the city, through downtown via the Milwaukee-Dearborn subway, and across the West Side to its...

 was dug under Dearborn Street in 1940.

The narrow building allows an external exposure to all of the 300 offices, which pass natural light via double hung outside windows through feather-chipped glass transom
Transom (architectural)
In architecture, a transom is the term given to a transverse beam or bar in a frame, or to the crosspiece separating a door or the like from a window or fanlight above it. Transom is also the customary U.S. word used for a transom light, the window over this crosspiece...

s and hallway partitions into the single central corridor. Skylights bring sunlight into the open stairwells. The north half corridors are 20 feet (6.1 m) wide and the south half corridors are 11 in 6 in (3.51 m). In the north half, there are two open stairs in the center at the one third points, with perforated riser
Stair riser
A stair riser is the near-vertical element in a set of stairs, forming the space between a step and the next. It is often slightly inclined from the vertical so that its top is closer than its base to the person climbing the stairs...

s, white marble treads, and decorative steel railings. There are two banks of four elevators on the west side of the corridor, one for passengers and the other for freight. In the south half, there is a single bank of elevators on the north half of the length. The southern bank was abandoned and slabbed over on each floor. There is a flight of stairs behind each of these shafts with marble treads, closed cast iron risers, and ornamental balusters. The basic office suite is 600 square feet (55.7 m²), consisting of one outer office and two or more inner offices. Heavy internal walls at the quarter and halfway points, the arches of which manifest Root's innovative wind bracing, mark the boundaries of the four original buildings.

Surrounding area

The Monadnock belongs to the Printing House Row District
Printing House Row District
The Printing House Row District is a U.S. historic district on the 500 through 800 blocks of South Dearborn, South Federal and South Plymouth Streets in the Loop community area of Chicago, IL...

, a National Historic Landmark
National Historic Landmark
A National Historic Landmark is a building, site, structure, object, or district, that is officially recognized by the United States government for its historical significance...

 which includes the Manhattan Building, the Old Colony Building
Old Colony Building (Chicago)
The Old Colony Building is 17-story landmark building in the Chicago Loop community area of Chicago, Illinois. Designed by the architectural firm Holabird & Roche in 1893-94, it stood at approximately 215 feet and was the tallest building in Chicago at the time it was built...

, and the Fisher Building
Fisher Building
The Fisher Building is an ornate Art Deco skyscraper located on the corner of West Grand Boulevard and Second Avenue in the heart of the New Center area of Detroit, Michigan. It is constructed of limestone, granite, and several types of marble, and was financed by the Fisher family with proceeds...

, some of Chicago's seminal early skyscrapers. The Manhattan Building, built by William LeBaron Jenney in 1890, was the first building in Chicago with a complete steel skeleton or "Chicago" construction, an innovation Jenney had introduced in the Home Insurance Building
Home Insurance Building
The Home Insurance Building was built in 1884 in Chicago, Illinois, USA and destroyed in 1931 to make way for the Field Building . It was the first building to use structural steel in its frame, but the majority of its structure was composed of cast and wrought iron...

 in 1884. The first 16-story building in America, at the time it was "regarded with awe and fear". Jenny's masterpiece, the Manhattan was considered a technical triumph in construction. The 17-story Old Colony, built by Holabird & Roche in 1894, was considered one of the structural masterpieces of its time for its revolutionary portal form of bracing. It is the only survivor of a group of Chicago school buildings with rounded corner bays. The Fisher Building, built by Burnham in 1894, was an engineering miracle—the first tall commercial building to be built almost entirely without bricks. Its steel frame and thin terracotta curtain wall
Curtain wall
A curtain wall is an outer covering of a building in which the outer walls are non-structural, but merely keep out the weather. As the curtain wall is non-structural it can be made of a lightweight material reducing construction costs. When glass is used as the curtain wall, a great advantage is...

 allowed two-thirds of the surface to be covered with glass.

The district overlaps geographically with the Printer's Row neighborhood, originally the center of Chicago's printing and publishing industry, but now mostly converted to residential housing. The area is also home to the largest public library in the world, the Harold Washington Library
Harold Washington Library
The Harold Washington Library Center is the central library for the Chicago Public Library System. It is named for former Mayor Harold Washington. It is located just south of the Loop 'L', at 400 S. State Street in Chicago. It is a full service library and ADA compliant. As with all libraries in...

, named for Chicago's first African-American mayor, and the Loop campus of Depaul University
DePaul University
DePaul University is a private institution of higher education and research in Chicago, Illinois. Founded by the Vincentians in 1898, the university takes its name from the 17th century French priest Saint Vincent de Paul...

, America's largest Roman Catholic university.

Immediately to the west on Jackson Street is the Union League Club of Chicago
Union League Club of Chicago
The Union League Club of Chicago is a prominent social club located in downtown Chicago.-History:The Club can trace its roots to 1862, when radical southern sympathizers in the north were plotting an insurrection in Lincoln’s home state...

, founded in 1879 as a civic organization for "upright, law-abiding businessmen". To the north are the three buildings comprising Ludwig Mies Van der Rohe
Ludwig Mies van der Rohe
Ludwig Mies van der Rohe was a German architect. He is commonly referred to and addressed as Mies, his surname....

's minimalist
Minimalism
Minimalism describes movements in various forms of art and design, especially visual art and music, where the work is set out to expose the essence, essentials or identity of a subject through eliminating all non-essential forms, features or concepts...

 Federal Plaza: the 1964 Everett McKinley Dirksen United States Courthouse
Everett McKinley Dirksen United States Courthouse
The Everett McKinley Dirksen United States Courthouse, commonly referred to as the Dirksen Federal Building, is a skyscraper in downtown Chicago, Illinois, at 219 South Dearborn Street. It was designed by Ludwig Mies van der Rohe and completed in 1964. The building is 384 feet tall, with 30...

, the only courthouse designed by Mies; the 1973 United States Post Office Loop Station; and the 1975 Kluczynski Federal Building, Mies's last project, considered to mark the apex of his career. The triangular, 27-story Metropolitan Correctional Center
Metropolitan Correctional Center, Chicago
The Metropolitan Correctional Center, Chicago is a federal remand center in the United States, located in downtown Chicago, Illinois, at the intersection of Clark and Van Buren Streets. It has a triangular footprint, and has an exercise yard for the prisoners on its roof...

, a detention center serving the Federal courts in the Dirksen Building and nearby Ralph H. Metcalfe Federal Building, is southwest of the Monadnock at Clark and LaSalle.

The south leg of the Chicago Transit Authority
Chicago Transit Authority
Chicago Transit Authority, also known as CTA, is the operator of mass transit within the City of Chicago, Illinois and some of its surrounding suburbs....

 elevated rail loop runs next to the building on Van Buren Street; the CTA's
Chicago Transit Authority
Chicago Transit Authority, also known as CTA, is the operator of mass transit within the City of Chicago, Illinois and some of its surrounding suburbs....

 Brown
Brown Line (Chicago Transit Authority)
The Brown Line starts out in northwest Chicago, at the Kimball and Lawrence Avenue terminal in Albany Park, where there is a storage yard and servicing shop for the trains to the east of the passenger station...

, Orange
Orange Line (Chicago Transit Authority)
The Orange Line, is a rapid transit line in Chicago, Illinois run by the Chicago Transit Authority as part of the 'L' system. It is approximately long, and runs below grade and elevated on existing railroad embankments and new concrete and steel structures from Chicago Midway International...

, Pink
Pink Line (Chicago Transit Authority)
The Pink Line is a rapid transit line in Chicago, run by the Chicago Transit Authority as part of the Chicago 'L' system. It began operation for a 180-day trial period on June 25, 2006, running between 54th/Cermak Station in Cicero, Illinois and the Loop in downtown Chicago...

, and Purple
Purple Line (Chicago Transit Authority)
The Purple Line of the Chicago Transit Authority is a branch line on the northernmost section of the Chicago 'L' rapid transit network. Normally, it extends south from the Wilmette terminal at Linden Avenue, passing through Evanston to Howard Street, on Chicago's northern city limits...

 Lines are served by the Library-State/Van Buren stop one block to the east. The Jackson
Jackson/Dearborn (CTA)
Jackson is a subway station on the Chicago Transit Authority's 'L' system, serving the Blue Line. This station just completed a remodeling project that made it look closer in appearance to the Jackson/State.-Bus connections:CTA...

 street subway station, serving the Blue Line, is on the Dearborn Street side of the building.

Critical reception and historical significance

Contemporary Chicago critics considered the building too radical a departure from Burnham & Root's previous designs and too extreme in its stark simplicity and disregard for prevailing aesthetic norms, calling it an "engineer's house" and a "thoroughly puritanical" example of commercial style. European critics were even less approving. In the words of French architect Jacques Hermant, "The Monadnock was no longer the result of an artist responding to particular needs with intelligence and drawing from them all of the possible consequences. It is the work of a laborer who, without the slightest study, super-imposes 15 strictly identical stories to make a block then stops when he finds the block high enough."

Other critics saw this lack of style as "natural" and what made the Monadnock truly modern. New York critic Barr Feree wrote in 1892 that "There are no attempts at facades ... no ornamental appendages, nothing but a succession of windows, frankly stating that the structure is an office building, devoted to business, needing and using every available surface." Other critics praised the truthfulness of the building to the ideals of business, which, while "not necessarily the highest to which we might aspire to in art ... are the only ideals the business building ought to express". Montgomery Schuyler
Montgomery Schuyler
Montgomery Schuyler, AIA, was a highly influential critic, journalist and editorial writer in New York City who wrote about and influenced art, literature, music and architecture during the city's "Gilded Age." He was active as a journalist for over forty years but is principally noted as a highly...

, one of the Monadnock's most enthusiastic defenders, argued that the Monadnock's lack of ornament was not a lack of art, but rather "radiated the gravity of modern business life".

The Monadnock was widely praised by early twentieth-century German architects, including Mies, who on his arrival in Chicago in 1938 declared that "The Monadnock block is of such vigor and force that I am at once proud and happy to make my home here." These European architects found the building's attention to purpose and functional expression inspiring. Bauhaus
Bauhaus
', commonly known simply as Bauhaus, was a school in Germany that combined crafts and the fine arts, and was famous for the approach to design that it publicized and taught. It operated from 1919 to 1933. At that time the German term stood for "School of Building".The Bauhaus school was founded by...

 architect Ludwig Hilberseimer
Ludwig Hilberseimer
Ludwig Karl Hilberseimer was a German architect and urban planner best known for his ties to the Bauhaus and to Mies van der Rohe, as well as for his work in urban planning at Armour Institute of Technology , in Chicago, Illinois.-Life:Hilberseimer studied architecture at the Karlsruhe Technical...

 wrote that "The false solution—unfortunately too common—of applying meaningless and misplaced adornment is here instinctively avoided. An innate feeling for proportion gives this great building inner consistency and logical purity."

Modern critics have praised the Monadnock as one of the most important exemplars of the Chicago school, along with Louis Sullivan's Carson, Pirie, Scott and Company Building
Carson, Pirie, Scott and Company Building
The Sullivan Center, formerly known as the Carson, Pirie, Scott and Company Building or Carson, Pirie, Scott and Company Store, is a commercial building at 1 South State Street at the corner of East Madison Street in Chicago, Illinois. It was designed by Louis Sullivan for the retail firm...

. It has been called "a triumph of unified design" comparable to Henry Hobson Richardson
Henry Hobson Richardson
Henry Hobson Richardson was a prominent American architect who designed buildings in Albany, Boston, Buffalo, Chicago, Pittsburgh, and other cities. The style he popularized is named for him: Richardsonian Romanesque...

's Marshall Field's Wholesale Store
Marshall Field's Wholesale Store
Marshall Field's Wholesale Store, Chicago, Illinois, sometimes referred to as the Marshall Field's Warehouse Store, was a landmark seven-story designed by Henry Hobson Richardson...

, and "one of the most exciting aesthetic experiences our commercial architecture has ever produced".

The building was one of the first five selected by the Chicago Commission on Architectural Landmarks in 1958, "in recognition of its original design and its historical interest as the highest wall-bearing structure in Chicago". The commission went on to note that the "restrained use of brick, soaring massive walls, omission of ornamental forms, unite in a building simple yet majestic." In 1973, the Chicago City Council voted unanimously to designate the Monadnock a Chicago Landmark
Chicago Landmark
Chicago Landmark is a designation of the Mayor of Chicago and the Chicago City Council for historic buildings and other sites in Chicago, Illinois, United States. Listed sites are selected after meeting a combination of criteria, including historical, economic, architectural, artistic, cultural,...

, stating that "The two halves of this building provide a unique perspective for examining the history and development of modern architecture.... Together, they mark the end of one building tradition and the beginning of another." Critics of the Monadnock's landmark status objected that it would prevent the necessary demolition of the building, which was "an excellent example of a building that is ... no longer fulfilling the functions it was designed to fulfill" and "a wasting asset" that underperformed the market and was far less valuable than the land on which it stood would be.

The National Register of Historic Places
National Register of Historic Places
The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

, to which the Monadnock was added in 1970, noted that "the sheer, unadorned walls of this building forming a powerful mass became, prophetically, a forerunner of the 'slab skyscraper'—a style not popular until the late 1920's" and that "the two sections ... make, as an ensemble, one of the strongest, yet refined architectural statements in the development of twentieth century architecture." Its nomination as a National Historic Landmark
National Historic Landmark
A National Historic Landmark is a building, site, structure, object, or district, that is officially recognized by the United States government for its historical significance...

 in 1976, as part of the South Dearborn Street-Printing House Row Historic District, included the comment that it was "one of the most classical statements ever made in the skyscraper idiom."

External links

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