The collection contains letters, programs, meeting minutes, speeches, event tickets, brochures, pamphlets, invitations, financial records, legislative materials, political memorabilia, and other rare items dating primarily from the 19th through the mid- 20th century.

Of particular significance are letters, petitions, and legislative acts documenting the work of elected and appointed mayors; a Board of Alderman; and City Councils from 1802 through the early 1870s in the “Politics and Government Series.” The District had an appointed Mayor and elected City Council from 1802 through 1812; in 1812 a Charter amendment allowed for the election of all city officials.

Another important series includes the newsletters, correspondence, flyers, programs, and yearbooks of the numerous civic, social, and cultural organizations starting in the late 19th century. These materials are primarily in two series: “Civic and Citizens Associations,” and “Societies, Clubs and Organizations.” Other notable items include Congressional speeches on the abolition of slavery from 1833 through the 1860s; guidebooks and published descriptions of Washington, D.C.; musical scores celebrating Washington, D.C. history and events; architectural specifications for the U.S. Capitol, House Office Building, Post Office and other local buildings; local business advertising; documentation for the founding and development of the Washington City Canal; Centennial memorabilia and programs; letters and autographs of famous persons and families; and publications and programs about or from churches, colleges, and schools in the District.