The Old Cambridge Historic District is a historic district

Historic district (United States)

In the United States, a historic district is a group of buildings, properties, or sites that have been designated by one of several entities on different levels as historically or architecturally significant. Buildings, structures, objects and sites within a historic district are normally divided...

 in an irregular pattern along Brattle Street

Brattle Street (Cambridge, Massachusetts)

Brattle Street in Cambridge, Massachusetts, called the "King's Highway" or "Tory Row" before the American Revolutionary War, is the site of many buildings of historic interest, including the modernist glass-and-concrete building that housed the Design Research store,and a Georgian mansion where...

 in Cambridge, Massachusetts

Cambridge, Massachusetts

Cambridge is a city in Middlesex County, Massachusetts, United States, in the Greater Boston area. It was named in honor of the University of Cambridge in England, an important center of the Puritan theology embraced by the town's founders. Cambridge is home to two of the world's most prominent...

.

The district 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...

 (NRHP) in 1983.

It includes 215 contributing buildings and one other contributing sites over an area of 52 acres (21 ha). One included building is the Mary Fisk Stoughton House

Mary Fisk Stoughton House

The Mary Fiske Stoughton House at 90 Brattle Street in Cambridge, Massachusetts, is a National Historic Landmark and an icon of American architecture...

, which is separately listed on the NRHP.

The Cambridge Historical Society's offices are in the NRHP-listed Hooper-Lee Nichols House, located at 159 Brattle Street.