The records of Castelli Graphics measure 45.7 linear feet and date from 1965 to 2001. Administrative files, correspondence, exhibition and project files, artists' files, financial and legal records, inventory and stock records, printed materials, and photographic materials document the activities of the New York art gallery and publishing firm founded by Antoinette Castelli.

The papers of government arts administrator and novelist Livingston L. Biddle, Jr. (1918-2002) measure 40.2 linear feet and date from circa 1940 to 2002. The papers are comprised of biographical materials, correspondence, interviews, writings, numerous files reflecting his work to establish the National Endowment for the Arts (NEA), political committee files, personal legal records, printed materials, scrapbooks, and photographs. Throughout the collection are video and sound recordings.

The papers of art historian, curator, and professor Robert Rosenblum measure 38.3 linear feet and 1.17 GB and date from circa 1927 to 2009, with the bulk dating from 1950 to 2006. They include biographical material, extensive personal and professional correspondence; lectures, writings, and writing project files by Rosenblum and others; exhibition files; research reference files; teaching files; personal business records; printed and digital material; photographs; and artwork.

The Leo Castelli Gallery records measure 215.9 linear feet and date from circa 1880-2000, with the bulk of the materials dating from the gallery's founding in 1957 through Leo Castelli's death in 1999. The major influence of dealer Leo Castelli and his gallery on the development of mid-to-late twentieth century modern art in America is well-documented through business and scattered personal correspondence, administrative files, exhibition files, extensive artists' files and printed materials, posters, awards and recognitions, photographs, and sound and video recordings. Also included are records for the subsidiary firms of Castelli Graphics and Castelli/Sonnabend Tapes and Films.

The papers of New York art historian, museum director, curator, writer, and educator, Alan R. Solomon, measure 9.9 linear feet and date from 1907-1970, with the bulk of the material dating from 1944-1970. Through biographical material, correspondence, interview transcripts, writings and notes, teaching and study files, subject files, exhibition files, business records, printed material, and photographs, the collection documents Solomon's education, his early teaching appointments at Cornell University, and his subsequent direction of many diverse curatorial and research projects relating to contemporary American art, particularly the transition from Abstract Expressionism to later modern movements, and the thriving New York City art scene.

The papers of American art collector, paint manufacturer, lecturer, and painter, Leonard Bocour measure 11.8 linear feet and date from 1933 to 1993. Found within the papers are biographical material; miscellaneous correspondence with artists and colleagues, including Helen Frankenthaler, Chaim Gross, Philip Guston, Alex Katz, Jack Levine, Morris Louis, David Oxtoby, and Philip Pearlstein; diaries, daily calendars, notes and writings; personal business records and the business records of Bocour Artist Colors, Inc.; transcripts of interviews with Bocour; and printed material.

The Robert Scull papers measure 2 linear feet and date from 1955 to circa 1984, with the bulk of the material dating from 1965 to 1970. Throughout the 1960s, Robert Scull was a wealthy and prominent art collector of Abstract, Pop, and Minimalist art whose collection included works by Michael Heizer, Jasper Johns, Robert Rauschenberg, and Andy Warhol, among others. HIs papers include fourteen annotated appointment books, correspondence, financial and legal records, printed material, and photographs.

The Dwan Gallery records measure 2.3 linear feet and consist primarily of files of exhibitions curated by Virginia Dwan at Dwan Galleries in Los Angeles (1959-1967) and New York (1965-1971). Found within this nearly comprehensive set of exhibition files may be lists of exhibited works, price lists, photographs, slides or color transparencies of installations, invitations, full-size posters, magazine and newspaper clippings and exhibition catalogs.

The records of the Fendrick Gallery measure 106.4 linear feet and span the years 1952 to 2001. The bulk of the collection is comprised of artist's files that document the gallery's relations with and representation of over 300 contemporary artists and sculptors, including Robert Arneson, William Bailey, Daniel Brush, Wendell Castle, Robert Cottingham, James Drake, John Dreyfuss, Walter Dusenbury, Roger Essley, Helen Frankenthaler , Sam Gilliam, Jasper Johns, Raymond Kaskey, Claude and Francois Lalanne, Albert Paley, Joseph Raffael, Carol Summer, and numerous other artists. Also found are subject, exhibition, commission, administrative, and financial files, as well as files documenting the gallery's relationship with other museums and galleries.

The papers of photographer, filmmaker, and painter Rudy Burckhardt measure 5.6 linear feet and date from 1934 to 2015. A bulk of the collection consists of black and white negatives which document over 260 mid-to-late twentieth century modern artists, their work, studios, and/or exhibitions. Notable artists include Willem de Kooning, Dan Flavin, Joseph Cornell, Helen Frankenthaler, Donald Judd, Franz Kline, Roy Lichtenstein, Louise Nevelson, Isamu Noguchi, Frank Stella, and many others. Burckhardt was hired to photograph for a number of New York art galleries such as the Leo Castelli Gallery and Green Gallery; art collectors including Chaim Gross and David Rockefeller; and art magazines such as ARTnews. Personal papers include announcements and an exhibition catalog; clippings; photographs on postcards; and a book, entitled Conversations with Rudy Burckhardt About Everything, by Simon Pettet, 1987. A small but rich addition to the collection dates from 1941-2015 and contains a curriculum vitae; letters from Joe Brainard, Harold Schimmel, and others; writings; one scrapbook dating from World War II containing letters Burckhardt wrote to Edwin Denby; printed announcements and clippings; and one photograph of Burckhardt taken by Yvonne Jacquette.