This collection is composed primarily of correspondence, memoranda, course material, photographs, drawings and slides. The collection is broken down into personal and academic papers. The academic papers pertain mainly to Colquhoun's career as a writer and theoretician and professor at Princeton University's School of Architecture. The personal papers consist mainly of correspondences with friends and family, as well as notebooks, which Colquhoun kept from the 1940s. The visual materials (photographs and drawings) straddle the two categories. Many of the photographs were taken by Colquhoun himself, to be used later in his teaching, while the drawings consist of both student work and reproductions of works from his practice with John Miller. For the majority of the collection, Colquhoun's folder titles have been maintained and the material has been arranged chronologically. The collection is arranged into four series.

Chip Lord (1944–) is an architect, media artist, and Professor Emeritus of Film & Digital Media at the University of California, Santa Cruz. Lord is best known for his work with the art and architecture group Ant Farm, which he co-founded with Doug Michels (1943–2003) in 1968. This collection, gathered by Lord, includes correspondence and material produced between 1968 and 1978, when the group disbanded following a fire at their Pier 40 studio in San Francisco, CA. In addition, the collection includes correspondence and material produced in the following decades that document Ant Farm-related products, anniversary celebrations, exhibitions, lectures, and publications, as well as material documenting litigation (including several cases of copyright infringement over use of Cadillac Ranch), licensing, and royalties.

Douglas Darden (1951-1996) was an American architect based out of Denver, Colorado. Darden was best known for his book Condemned Building, a collection of ten allegorical projects. This collection contains much of Darden's work for that book as well as the process work for his second book, Laughing Girls, which he was working on at the time of his death. It also contains a large portion of his early works and his professional papers in the form of documents, drawings, photographs, and slides.

This collection documents the life and career of Edgar Allen Tafel: New York architect, Frank Lloyd Wright historian, and one of the original apprentices of the Taliesin Fellowship from 1932. The collection primarily documents Tafel's professional activities and his later independent architectural career which was most prominent from 1965-1985. The collection is made up of nine series: Personal Papers, Correspondence, Writings, Professional Papers, Office Records, Project Records, Photographs and Slides, Audio-Visual Material, and Printed Material.

Henry Hope Reed (1915-2013) was an American author, architecture critic and advocate of classical architecture. Along with writing and giving New York City walking tours, Reed served curator of Central Park and co-founder of Classical America. This collection contains his writings, correspondence, photographs and extensive research files on classical architecture and the people, parks, buildings, streets and history of New York City.

New York architect, historian, and attorney Andrew Alpern co-wrote Holdouts! The Buildings That Got In The Way with Seymour Durst. Holdouts! examines over 50 examples of New York City holdouts or building owners who refuse to make way for office buildings and other urban designing projects.

Jane C. Loeffler (1947–) is an architectural historian and author of The Architecture of Diplomacy: Building America's Embassies. A graduate of Wellesley College and Harvard's Graduate School of Design, she holds a Ph.D. in American civilization from The George Washington University and has published numerous articles in Architectural Record, The Foreign Service Journal, The Journal of the Society of Architectural Historians, The New York Times, and elsewhere. In addition, Loeffler has provided expert witness testimony before House subcommittees on the importance of design within public policy and was twice awarded by the State Department for her public service. This collection consists mainly of reference materials related to embassy design and its cultural significance, as well as the architectural history of the United States foreign building program.

This collection documents the life and career of J. Max Bond, Jr., one of the most influential and prominent African-American architects and educators in the United States. The collection primarily documents Bond's professional activities rather than his building projects; however, the collection does contain project records and office records. The collection is made up of six series: Office Records, Personal Papers, Faculty Papers, Professional Papers, Project Records, and Reference Materials.

Joan McClure (1914-2005) was a resident of the West Village in New York City for more than sixty years and active in many local civic and social issues. She was closely involved in the planning for the Westway highway along the Hudson River, the creation of a landscaped traffic island at Abbingdon Square, and the founding of the Village Halloween Parade.