Aon Center (Chicago)
Overview
 
The Aon Center is a modern skyscraper in the Chicago 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...

, 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,...

, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, designed by architect firms Edward Durell Stone
Edward Durell Stone
Edward Durell Stone was a twentieth century American architect who worked primarily in the Modernist style.-Early life:...

 and The Perkins and Will
Perkins and Will
Perkins+Will was founded in Chicago in 1935 by and ., on the belief that design has the power to transform lives and enhance society...

 partnership, and completed in 1973 as the Standard Oil Building. With 83 floors and a height of 1,136 feet (346 m), it is the third tallest building in Chicago, surpassed in height by the Willis Tower and the Trump International Hotel and Tower
Trump International Hotel and Tower (Chicago)
The Trump International Hotel and Tower, also known as Trump Tower Chicago and locally as the Trump Tower, is a skyscraper condo-hotel in downtown Chicago, Illinois. The building, named after real estate developer Donald Trump, was designed by architect Adrian Smith of Skidmore, Owings and Merrill...

. The building is managed by Jones Lang LaSalle
Jones Lang LaSalle
Jones Lang LaSalle, Inc. is a multinational financial and professional services company specializing in real estate. Global headquarters are located in Chicago, with an operational remit covering the Americas regional market...

. Aon has the headquarters of the Aon Corporation, and it formerly had the headquarters of Amoco
Amoco
Amoco Corporation, originally Standard Oil Company , was a global chemical and oil company, founded in 1889 around a refinery located in Whiting, Indiana, United States....

.
Encyclopedia
The Aon Center is a modern skyscraper in the Chicago 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...

, 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,...

, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, designed by architect firms Edward Durell Stone
Edward Durell Stone
Edward Durell Stone was a twentieth century American architect who worked primarily in the Modernist style.-Early life:...

 and The Perkins and Will
Perkins and Will
Perkins+Will was founded in Chicago in 1935 by and ., on the belief that design has the power to transform lives and enhance society...

 partnership, and completed in 1973 as the Standard Oil Building. With 83 floors and a height of 1,136 feet (346 m), it is the third tallest building in Chicago, surpassed in height by the Willis Tower and the Trump International Hotel and Tower
Trump International Hotel and Tower (Chicago)
The Trump International Hotel and Tower, also known as Trump Tower Chicago and locally as the Trump Tower, is a skyscraper condo-hotel in downtown Chicago, Illinois. The building, named after real estate developer Donald Trump, was designed by architect Adrian Smith of Skidmore, Owings and Merrill...

. The building is managed by Jones Lang LaSalle
Jones Lang LaSalle
Jones Lang LaSalle, Inc. is a multinational financial and professional services company specializing in real estate. Global headquarters are located in Chicago, with an operational remit covering the Americas regional market...

. Aon has the headquarters of the Aon Corporation, and it formerly had the headquarters of Amoco
Amoco
Amoco Corporation, originally Standard Oil Company , was a global chemical and oil company, founded in 1889 around a refinery located in Whiting, Indiana, United States....

. The Aon Center is almost identical in design and floorplan to First Canadian Place
First Canadian Place
First Canadian Place is a skyscraper in the financial district of Toronto, Ontario, Canada, at the northwest corner of King and Bay streets, and is the location of the Toronto headquarters of the Bank of Montreal. At , it is Canada's tallest skyscraper and the 15th tallest building in North America...

 in Toronto, Canada, the only major design difference being the orientation of the exterior windows.

History

The Standard Oil Building was constructed as the new headquarters of the Standard Oil Company of Indiana
Amoco
Amoco Corporation, originally Standard Oil Company , was a global chemical and oil company, founded in 1889 around a refinery located in Whiting, Indiana, United States....

, which had previously been housed at South Michigan Avenue and East 9th Street. When it was completed in 1973 it was the tallest building in Chicago and the fourth-tallest in the world, earning it the nickname "Big Stan". (A year later, the Sears Tower took the title as Chicago's and world's tallest.) The building employs a tubular steel-framed structural system with V-shaped perimeter columns to resist earthquakes, reduce sway, minimize column bending, and maximize column-free space. This construction method was also used for the World Trade Center
World Trade Center
The original World Trade Center was a complex with seven buildings featuring landmark twin towers in Lower Manhattan, New York City, United States. The complex opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks. The site is currently being rebuilt with five new...

 towers in New York City
New York City
New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

.

When completed, it was the world's tallest marble
Marble
Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite.Geologists use the term "marble" to refer to metamorphosed limestone; however stonemasons use the term more broadly to encompass unmetamorphosed limestone.Marble is commonly used for...

-clad building, being sheathed entirely with 43,000 slabs of Italian Carrara marble. The marble used was thinner than previously attempted in cladding a building; this quickly proved to be a mistake. In 1974, just a year after completion, one of the marble slabs detached from the façade and penetrated the roof of the nearby Prudential Center
One Prudential Plaza
One Prudential Plaza is a 41-story structure in Chicago completed in 1955 as the headquarters for Prudential's Mid-America company...

. Further inspection found numerous cracks and bowing in the marble cladding of the building. To alleviate the problem, stainless steel straps were added to hold the marble in place. Later, from 1990 to 1992, the entire building was refaced with Mount Airy
Mount Airy, North Carolina
Mount Airy is a city in Surry County, North Carolina, United States. As of the 2010 census, the city population was 10,388.-History:Mount Airy was settled in the 1750s as a stagecoach stop on the road between Winston-Salem and Galax, Virginia. It was named for a nearby plantation...

 white granite
Granite
Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...

 at an estimated cost of over $80 million. (Amoco was reluctant to divulge the actual amount, but it was well over half the original price of the building, without adjustment for inflation.) Two-thirds of the discarded marble was crushed and used as landscaping decoration at Amoco's refinery in Whiting, Indiana
Whiting, Indiana
Whiting is a city located in the Chicago Metropolitan Area in Lake County, Indiana, which was founded in 1889. The city is located on the southern shore of Lake Michigan. It is roughly 16 miles from the Chicago Loop and just short of two miles from Chicago's South Side. Whiting is home to Whiting...

, one-sixth was donated to Governor's State University, in University Park, Illinois, and one-sixth donated to Regalo, a division of Lashcon Inc. Under a grant from the Illinois Department of Rehabilitative Services, Regalo's 25 handicapped workers carved the discarded marble into a variety of specialty items such as corporate gifts and mementos including desk clocks and pen holders. The building's facade now somewhat resembles that of the former World Trade Center
World Trade Center
The original World Trade Center was a complex with seven buildings featuring landmark twin towers in Lower Manhattan, New York City, United States. The complex opened on April 4, 1973, and was destroyed in 2001 during the September 11 attacks. The site is currently being rebuilt with five new...

 due to the upward flow of the columns.

The Standard Oil Building was renamed the Amoco Building when the company changed names in 1985. In 1998, Amoco sold the building to The Blackstone Group for an undisclosed amount, estimated to be between $430 and $440 million. It was renamed as the Aon Center on December 30, 1999, although the Aon Corporation would not become the building's primary tenant until September 2001. In May 2003, Wells Real Estate Investment Trust, Inc. acquired the building for between $465 and $475 million.
(On August 10, 2007, Wells Real Estate Investment Trust, Inc. changed its name to Piedmont Office Realty Trust, Inc.)

Exterior lighting

In recent years, the top floors of the building have been lit at night with colors to reflect a particular season or holiday. Orange is used for Thanksgiving
Thanksgiving
Thanksgiving Day is a holiday celebrated primarily in the United States and Canada. Thanksgiving is celebrated each year on the second Monday of October in Canada and on the fourth Thursday of November in the United States. In Canada, Thanksgiving falls on the same day as Columbus Day in the...

, green or red for Christmas, and pink during National Breast Cancer Awareness Month
National Breast Cancer Awareness Month
Breast Cancer Awareness Month is an annual international health campaign organized by major breast cancer charities every October to increase awareness of the disease and to raise funds for research into its cause, prevention, diagnosis, treatment and cure...

. The lighting commonly matches the nighttime lighting on the antenna
Antenna (radio)
An antenna is an electrical device which converts electric currents into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver...

 of Willis Tower, the John Hancock Center and the upper floors of the Merchandise Mart
Merchandise Mart
When opened in 1930, the Merchandise Mart or the Merch Mart, located in the Near North Side, Chicago, Illinois, was the largest building in the world with of floor space. Previously owned by the Marshall Field family, the Mart centralized Chicago's wholesale goods business by consolidating vendors...

.

Tenants

  • Aon Corporation maintains its headquarters in the Aon Center.
  • Chicagoland Chamber of Commerce
    Chicagoland Chamber of Commerce
    The Chicagoland Chamber of Commerce is a non-profit organization promoting business in the Chicago metropolitan area of the United States. The Chamber is a voice at local, state and national levels for approximately 2,600 member companies and their 1.3 million employees...

    , Suite 2200
  • Agency.com
  • BP
    BP
    BP p.l.c. is a global oil and gas company headquartered in London, United Kingdom. It is the third-largest energy company and fourth-largest company in the world measured by revenues and one of the six oil and gas "supermajors"...

     (formerly British Petroleum), successor to Amoco
    Amoco
    Amoco Corporation, originally Standard Oil Company , was a global chemical and oil company, founded in 1889 around a refinery located in Whiting, Indiana, United States....

     and Standard Oil of Ohio
    Standard Oil of Ohio
    Standard Oil of Ohio or Sohio was an American oil company that was acquired by British Petroleum, now called BP.It was one of the successor companies to Standard Oil after the antitrust breakup in 1911. Standard Oil of Ohio was the original Standard Oil company founded by John D. Rockefeller. It...

  • Jones Lang LaSalle
    Jones Lang LaSalle
    Jones Lang LaSalle, Inc. is a multinational financial and professional services company specializing in real estate. Global headquarters are located in Chicago, with an operational remit covering the Americas regional market...

  • Daniel Edelman Inc.
  • Marketing Support Inc.
  • ThoughtWorks
    ThoughtWorks
    ThoughtWorks is a privately owned global IT consultancy that delivers custom software, software tools, consulting, and transformation services to Global 1000 companies. It has a products division, ThoughtWorks Studios, which creates and markets software development and project management applications...

  • R.H. Donnelley
  • Strata Decision Technology
  • The Mid-America Club
  • Veolia
  • Microsoft
    Microsoft
    Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...


See also


External links

The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
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