Alexander McMillan Welch (1869-1943) was a New York City based architect who practiced independently and as a member of Welch, Smith & Provot. His firm was best known for designing New York City townhouses in the Beaux-Arts style. The collection includes 1,641 architectural drawings, 196 student drawings, 14 student notebooks, 99 loose photographs and 3 photo albums of project photography, project specifications and files, and some professional ephemera.

Drawings show plans, elevations, and sections for the Southwest Apartment on the 11th and 12th story of 1 Lexington Avenue.

Charles Adam Platt (1861-1933) was an American architect and landscape designer. Although best remembered today for his landscape and country house designs, he was also nationally known for his etchings, landscape paintings, commercial architecture, and institutional projects. He was largely self-taught in each of these disciplines, building his success on his ability to reconceive the classical tradition in architecture for the needs and desires of his wealthy, powerful clients. This collection contains materials related to Platt's personal and professional lives, the bulk originating from Platt's office in the form of project drawings, photographs, and records documenting architectural projects from 1901-1933.

Architectural drawings and photographs of Litchfield's designs for Yorkship village (housing for ship workers during World War I near Camden, N.J.); Public Library, St. Paul, Minn.; memorial to Theodore Roosevelt at Oyster Bay, Long Island, N.Y.; 800 Park Avenue and other New York City apartment houses; Albany Post Office, Albany, N.Y. (designed by Gander, Gander & Gander, with Litchfield as consulting architect); and other projects.

This collection included primarily original and reprographic architectural drawings by Roth, circa 1907-circa 1949, largely of apartment buildings located in Manhattan and designed during the 1920s and 1930s. Represented are the San Remo Towers, The Beresford, The Oliver Cromwell, the Normandy, and numerous other apartment buildings. There are also drawings for several hotel and private residences. A two-volume typescript autobiography is also included.

Architectural drawings for projects designed by Howells & Stokes, and by Stokes working independently, particularly, residence for Stokes' father, financier and philanthropist Anson Phelps Stokes (1838-1913) at Collender's Point, Darien, Conn., 1902-1905; a house for himself"High-Low House" Greenwich, Conn., 1901-1917; house for his wife at Indian Harbor, Greenwich, Conn., 1927, undated; outdoor pulpit for the Cathedral of St. John the Divine, New York, 1912-1915 (built in 1916); proposal for an apartment house at 953 Fifth Ave., New York, 1924-1926; competition entry for the Chicago Tribune Tower, undated (the competition, 1922, was won by Raymond Hood); and St. Paul's Chapel, Columbia University, New York, 1904-1930. Also, miscellaneous designs; competition entries; designs for unidentified buildings; designs for apartment buildings and housing projects; photographs of buildings by Stokes; landscape designs done by the Olmsted Brothers firm for Stokes for an unidentified project or projects. Also included are documents relating to the planning, construction, and, later, repairs and the addition of memorial tablets to St. Paul's Chapel, Columbia University, which was designed by Howells & Stokes and built in 1907. Correspondence, with related memoranda, estimates, specifications, accounts, contracts between Howells and Stokes or Stokes with Columbia University officials, and contractors and suppliers date from 1903 to the 1930s.

Max Gordon (1931-1990) was an internationally renowned architect who specialized in the design of galleries and exhibition spaces for modern and contemporary art. The collection is composed primarily of project files, architectural drawings, photographs, correspondence, legal papers, personal diaries, and student sketchbooks.

This collection contains architectural photographs, drawings and records related to the architectural projects and designs of Warren and Wetmore, principally in the United States, but also representing commissions in Canada, Cuba, and Puerto Rico. Unfortunately, the bulk of architectural drawings produced by the firm are no longer extant. Additionally, it holds a variety of photographs and other records used as reference materials in the course of Warren and Wetmore's professional work. Lastly, a small group of student and personal papers and photographs from Whitney Warren completes the collection.