Gordon Bunshaft (1909-1990) was an American architect who, as a partner at Skidmore, Owings & Merrill, had a significant impact on large-scale corporate architecture. His projects include such significant urban office towers as the Lever House in midtown Manhattan, as well as modern office campuses set in natural landscapes, including such examples as the American Can Company in Greenwich, Connecticut or the Connecticut General Life Insurance Company headquarters in Bloomfield, Connecticut. Additionally, his interest in art caused him to actively integrate work by well-known modern artists into the public plazas and interiors of SOM's projects. The professional aspects of this collection can be found in clippings, project photography, oral history records, and publications, however, the majority of the collection is personal and reflects the life of Gordon and his wife Nina Bunshaft. Through correspondence, snapshots, objects, and personal papers the collection focuses on the Bunshafts' friends, their travels, and their impressive art collection of both modern and ancient sculptures and paintings.

The Wallace K. Harrison architectural drawings and papers consists of architectural drawings, photographs, correspondence, notes, speeches, manuscripts, press releases, clippings, memoranda, printed material, job lists, curriculam vitae, contracts, articles, and other material related to Harrison's architectural projects. The collection also contains a significant amount of material regarding Harrison's position as director of the Office of Inter-American Affairs, director of planning of the United Nations Headquarters and biographical material. Approximately a third of the collection is made up of photographs. Photographers include Wendy Barrows, Shirley Burden, George Cserna, Y[uzo] Nagata, and Ezra Stoller, among many others. There is also a collection of 148 art books that belonged to Harrison referred to as his "doodle books." A list of these books with brief descriptions of where Harrison drew in them is contained in the finding aid. Projects documented include Lincoln Center, Metropolitan Opera House, Rockefeller Center, Albany Mall (Empire State Plaza), United Nations, X City, ALCOA building, Corning Glass building, First Presbyterian Church, La Guardia Airport, Socony-Mobil building, Battery Park City, Radio City Music Hall, New York World's Fair (1939 and 1964), Institute for Advanced Study, National Academy of Science, Pahlavi National Library Competition, Oberlin College's Hall Auditorium, Pershing Memorial, Rockefeller University, Hopkins Center, The Anchorage, Avila Hotel, and numerous other buildings and residences.

Max Abramovitz (1908-2004) was an American architect, whose firm Harrison & Abramovitz was one of the leading architectural practices in post-war America. Major commissions include Lincoln Center's Philharmonic Hall and the United Nations complex. The collection contains over 14,500 drawings, over 5,000 photographs, 24 boxes of manuscript material, 7 boxes of oversize material, 23 boxes of financial records, 5 boxes of reprint tear sheets, 36.75 linear feet of specification notebooks, photo albums, sketchbooks, art and artifacts.

Architectural drawings, correspondence, accounts, estimates, specifications, invoices, contracts, samples, invoices, and other material related to William Muschenheim's projects. The William Muschenheim Architectural Drawings and Papers span 1929-1957, with bulk dates 1931-1950. Muschenheim's papers document 130 separate jobs, and the visual material (described in RLIN VIM), consists of 3081 sheets of drawings. The projects mainly represent Muschenheim's work in New York City, but also include work in Albany (NY), Amenia (NY), Bridgehampton (NY), Chappaqua (NY), Hampton Bays (NY), Malverne (NY), Massapequa (NY), Nassau Point (Long Island), Washington (CT), Washington DC, Westhampton Beach (NY), and Woodstock (NY), among other locations. William Muschenheim also had numerous clients which included the following family members: Carl Muschenheim, Elsa Muschenheim, and Frederick A. Muschenheim. In addition to the many clients for whom he did alteration work, Muschenheim also worked with a wide variety of companies including Bigelow Carpet Company, C.G. Flygare Inc., Excel Metal Cabinet Co., F. Schumacher & Co., Famaes Development, Hans Knoll, Howard & Schaffer, Inc., Kurt Versen Lamps, Inc., Ledlin Light Designers, Portland Cement Association, and Thonet Brothers, among many others