The papers of New York City art entrepreneur, curator, and journalist Joan Kron date from 1959 to 1971 and measure 1.4 linear feet. The papers include correspondence, scattered financial records, notes and writings, printed material, photographs, a sound and video recording, and project/exhibition files concerning Kron's involvement in the 1960s with the exhibtions of the Arts Council of the Young Men's/Women's Hebrew Association (YM/WHA)of Philadelphia and her business, the Beautiful Bag and Box Co.

The papers of painter, printmaker, and sculptor Peter Krasnow (1886-1979) and his wife, writer Rose Krasnow (1885-1984), measures 6.9 linear feet and date from 1914 to 1984. Papers include biographical materials, a sound recording, correspondence, essays, poetry, short stories, notes, transcripts of lectures and radio talks, five diaries of Peter Krasnow, personal business records, exhibition catalogs and announcements, clippings, magazines, five sketchbooks, sketches and drawings in multiple media, prints, and photographs.

The papers of the painter, photographer, printmaker, and teacher Joseph Kaplan measure 4.5 linear feet and date from 1915-1977. The bulk of the collection consists of printed material, specifically exhibition catalogs. Also found are a large number of photographs taken of and by Kaplan. The papers also include biographical material, correspondence, personal business records, and artwork.

This collection, which measures 7.9 linear feet and dates from 1851 to 1995 (bulk 1913-1995), documents the life and career of muralist, sculptor, and educator Reuben Kadish. The papers contain biographical material, letters, personal business records, an exhibition file, notes, writings, artwork, printed material, photographs, and artifacts.

The papers of architect Albert Kahn date from 1875-1970, bulk 1875-1945, and measure 7.02 linear feet. Found within the papers is biographical material, correspondence, personal business records, nine sketchbooks, art work, notes and writings, two scrapbooks, printed material, photographs and photograph albums, artifacts, and motion picture film.

The papers of painter, printmaker, and curator Jacob Kainen measure 33.3 linear feet and date from 1905 to 2009, with the bulk of the material from 1940-2001. The bulk of the collection consists of correspondence/subject files including personal correspondence to and from friends and family members and professional correspondence and records concerning Kainen's activities as an artist, curator, teacher, and art collector. The collection also contains biographical material, writings, diaries, calendars, inventories, interview transcripts, printed material, photographs, works of art by other artists, and nine scrapbooks.

The papers of cubist painter Karl Knaths measure 8.9 linear feet and date from 1890 to 1973, with the bulk of the materials dating from 1922 to 1971. The collection includes biographical material, personal and professional correspondence, four diaries, 22 notebooks and notes on theoretical color and compositional approaches to painting, published and draft copies of essays on art, miscellaneous printed material, 132 sketchbooks and other artwork.

The Sylvester Rosa Koehler papers measure 5.4 linear feet and date from 1833 to 1904, with the bulk of the material dating from 1870 to 1890. The collection consists primarily of Koehler's extensive correspondence to and from many notable artists and printmakers such as Jean F. Harfin, John M. Falconer, Frederick Juengling, and James D. Smillie, as well as friends, and family members and professional correspondence concerning Koehler's activities as a writer, curator, and editor of the American Art Review. The collection also contains financial records and other miscellaneous items.

The papers of New York artist Lillian Kiesler and architect and sculptor Frederick Kiesler measure 49.1 linear feet and 0.001 GB and date from circa 1910s-2003, with the bulk of the material from 1958-2000. The collection documents their personal and professional lives and the legacy of Frederick Kiesler's work through biographical material, correspondence, legal, financial and business records, teaching files, exhibition and performance files, artwork, subject files, printed and digital material, writings and interviews, monographs, photographic material, and sound and video recordings. Also found are papers related to Abstract Expressionist painter Hans Hofmann and the papers of artist Alice Hodges.

The letters of Eastman Johnson measures 0.2 linear feet and contains 12 items that date from 1851 to 1899. The letters provide scattered documentation of his career as a painter and printmaker.