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.

The papers of sculptor, painter, and race car driver Salvatore Scarpitta measure 3.1 linear feet and date from 1934 to 2012. The papers include personal and professional letters from friends and galleries, exhibition and loan files, legal records pertaining to Scarpitta's estate, financial records, a scrapbook, photographs, printed material, and video recordings.

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 painter and sculptor Richard Artschwager measure 5.6 linear feet and date from 1959-2013. The papers include extensive correspondence, recorded talks and a lecture, exhibition files, printed material, and photographs.

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 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 New York School painter Ludwig Sander measure 2.8 linear feet and date from 1910 to 1975. Found are biographical materials primarily consisting of army records; correspondence with family and colleagues discussing exhibitions and other art-related activities; diaries; personal scattered business records; address books and art history typescripts; sketchbooks and illustrations for magazines; photographs of Sander, his colleagues, his travels, and exhibition openings; and miscellaneous printed material. The collection documents Sander's career and interactions with some of the most important modern artists of twentieth century.

The Ivan C. Karp papers and OK Harris Works of Art gallery records measure 80.3 linear feet and are dated 1960-2014. The collection documents the operation and activities of the contemporary art gallery founded by Ivan C. Karp in the SoHo area of Manhattan. Exhibition files, artist files, printed material and photographic materials reveal the wide range of artists represented by OK Harris and the gallery's role in introducing Photo-realism to the public. Aso included are administrative files, prints by OK Harris artists, business and personal correspondence, 39 journals by Karp spanning a period of 62 years, and other personal papers. Material pre-dating the 1969 establishment of OK Harris Works of Art consists of printed items and a few letters.

The Jack Tworkov papers measure 9.7 linear feet and are dated 1926-1993. Tworkov's work as a painter and influential teacher, as well as his personal life, are documented by extensive journals and substantive correspondence that record his ideas about art and teaching, and illuminate his relationships with friends, colleagues, and students. Many sketchbooks, writings, interviews, photographs, and moving images are also included.

The papers of New York art collector Douglas Cramer measure 1.3 linear feet and date from circa 1970-2014. Papers include letters from artists, four guest books signed by visitors to Cramer's art collection and attendees of his parties, printed material documenting Cramer's career in television as well as his prominence as an art collector, and photographs of people and artists who attended his parties including Ellsworth Kelly, Ed Ruscha, Mary Boone, Leo Castelli, and others.