The Chicago History Museum Research Center holds primary sources on Chicago history. The collection focuses on material related to living, working, government, politics and architecture and culture in the Chicago metro area.
Cornell holds thousands of rare books on architecture and nearly 300 archival collections on rare books and city planning. The collection is particularly strong in early 20th century U.S. city planning.
The LaGuardia and Wagner Archives holds material documenting the social and political history of New York City including the personal papers and official documents of Mayors Fiorello H. LaGuardia, Robert F. Wagner, Abraham D. Beame and Edward I. Koch. The collection also includes the records of the New York City Housing Authority, and the Council of the City of New York.
The Urban Archive holds material relating to the social, economic, and physical development of Philadelphia. Areas of emphasis include social service organizations, labor, housing development, and community organizations.