The papers of painter Joan Semmel measure 5.9 linear feet and span the dates of 1949-2013 with the bulk of the material dated circa 1960s-2013. The papers reflect her career and activities as a painter, writer, feminist, and educator through biographical materials, correspondence, interviews, writings, project files, teaching files, printed material, and photographic materials.

The records of the Architectural League of New York measure 114.9 linear feet and date from 1880s-1974 (bulk 1927-1968). The League's mission "to advance the art of architecture" is documented through administrative and business records, committee records and officers' files, exhibition files, records of functions and events, correspondence, publicity files, photographs, lantern slides, and 16 scrapbooks.

The Frank K. M. Rehn Galleries records measure 21.8 linear feet and are dated 1858-1969 (bulk 1919-1968). The records consist mainly of business correspondence with collectors, artists, museums and arts organizations, colleagues, and others. A small amount of Frank K. M. Rehns personal correspondence and a few stray personal papers of individual artists are interfiled. Also included are financial records, scrapbooks, printed matter, miscellaneous records, and photographs documenting most of the history of a highly regarded New York City art gallery devoted to American painting.

The records of the Woman's Building feminist arts organization in Los Angeles measure 33.5 linear feet and date from 1970-1992. Originally founded by artist Judy Chicago, graphic designer Sheila Levant de Bretteville, and art historian Arlene Raven in 1973, the Woman's Building served as an education center and public gallery space for women artists in southern California. The records document both the educational and exhibition activities and consist of administrative records, financial and legal records, publications, curriculum files, exhibition files, grant funding records and artist's works of arts and prints. A significant portion of the collection documents the Women's Graphic Center, a typesetting, design, and printing service operated by The Woman's Building.

The papers of painter, teacher, and writer Hans Hofmann measure 29.92 linear feet and 5.00 GB and date from circa 1904 to 2011, with the bulk of the materials dating from 1945 to 2000. The majority of the papers were created after 1932 and document Hofmann's life and professional career after settling in the United States. Among his papers are personal and professional correspondence; records of his schools in Munich, New York City, and Provincetown, Mass.; writings and notes; financial records; photographs; printed matter; estate records; and a small number of personal papers of his second wife, Renate Schmitz Hofmann. Hofmann's personal papers are augmented by a large selection of printed matter, including exhibition catalogs, articles, news clippings, and monographs about Hofmann and modern art, as well as documentary projects including Tina Dickey's compilation of oral histories and records of Hofmann's students, and research materials, sound and video recordings, digital material, and motion picture film created and gathered by Madeline Amgott during the production of two video documentaries about Hans Hofmann released in 1999 and 2002. Hofmann's Library was acquired with his papers; inscribed/annotated volumes have been retained with the collection.

The records of New York City Kraushaar Galleries measure 106.3 linear feet and 0.181 GB and date from 1877 to 2006. Three-fourths of the collection documents the gallery's handling of contemporary American paintings, drawings, and sculpture through correspondence with artists, private collectors, museums, galleries, and other art institutions, interspersed with scattered exhibition catalogs and other materials. Also included are John F. Kraushaar's estate records; artists' files; financial ledgers documenting sales and gallery transactions; consignment and loan records; photographs of artwork; sketchbooks and drawings by James Penney, Louis Bouché, and others; and two scrapbooks. There is a 6.0 linear foot unprocessed addition to this collection donated in 2022 that includes correspondence with artists, galleries, organizations and individuals regarding works of art, filed alphabetically by year. Materials date from circa 1959-1999, with the bulk from 1990-1999.

The Leo Castelli Gallery records measure 215.9 linear feet and 0.001 GB 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.

This collection contains over 37,000 35mm slides, 3,000 glass lantern slides and garden files that may include descriptive information, photocopied articles (from journals, newspapers, or books), planting lists, correspondence, brochures, landscape plans and drawings. Garden files were compiled by Garden Club of America (GCA) members for most of the gardens included in the collection. Some gardens have been photographed over the course of several decades; others only have images from a single point in time. In addition to images of American gardens, there are glass lantern slides of the New York Flower Show (1941-1951) and trips that GCA members took to other countries, including Mexico (1937), Italy, Spain, Japan (1935), France (1936), England (1929), and Scotland. A number of the slides are copies of historic images from outside repositories including horticultural and historical societies or from horticultural books and publications. The GCA made a concerted effort in the mid-1980s to acquire these images in order to increase its documentation of American garden history. Because of copyright considerations, use of these particular images may be restricted.

A collection of approximately 28,000 glass plate negatives showing views of a variety of subjects.

Records documenting Pratt, Read and Company; its early competitor and later partner, Comstock, Cheney and Company; and a number of predecessor, subsidiary and related companies. Other topics include the late 19th century African ivory trade and Pratt, Read's production of troop-carrying gliders during World War II.