This collection contains the professional papers of William Curtis Sturtevant and documents his activities as Curator of North American Ethnology at the National Museum of Natural History, his work as the editor-in-chief of the Handbook of North American Indians, his research among the Seminole and Iroquois people, and other professional activities. The collection is comprised of books, sound recordings, research and field notes, realia, artifacts, clippings, microfilm, negatives, slides, photographs, manuscripts, correspondence, memorandums, card files, exhibition catalogs, articles, and bibliographies.

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.

The papers of filmmaker, photographer, painter, printmaker, teacher, and arts advocate Maryette Charlton measure 81 linear feet and date from circa 1890 to 2013. This particularly rich collection includes biographical materials, correspondence, writings, 30 diaries, teaching files, professional and project files, major film project files, artist research files, exhibition files, printed material, scrapbooks, artwork, 22 sketchbooks, extensive photographic materials, numerous sound and film recordings, a digitized sound recording, and an unintegrated later addition to the papers containing additional biographical materials, journals, correspondence, subject files, printed materials, and scattered photographs.

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 Department of Anthropology records contain administrative and research materials produced by the department and its members from the time of the Smithsonian Institution's foundation until today.

This record unit documents the activities of the Office of the Registrar staff and consists of temporary loan files; temporary exhibition files, including shipping, insurance information, and loan agreements; general correspondence files; administrative files; and the files of the Smithsonian Art Commission, 1963-1975.

The collection forms a documentary record of over half a century of the history of radio, with the greatest emphasis on the period 1900-1935. The collection includes materials that span the entire history of the growth of the radio industry. It is useful for those historians and other researchers interested in technological development, economic history, and the impact of applications of technology on American life.

The Smithsonian Institution Festival of American Folklife, held annually since 1967 on the National Mall in Washington, D.C., was renamed the Smithsonian Folklife Festival in 1998. The materials collected here document the planning, production, and execution of the annual Festival, produced by the Smithsonian Center for Folklife and Cultural Heritage (1999-present) and its predecessor offices (1967-1999). An overview of the entire Festival records group is available here: Smithsonian Folklife Festival records.

The records of Midtown Galleries measure 86.82 linear feet and date from 1904 to 1997. The collection documents the operation and general administration of the business and includes artist records, exhibition material, inventories, financial records, photographs, and printed material.

The records of the Richard York Gallery, a New York gallery specializing in American art from early 1800s to 1950, measure 79.3 linear feet and date from circa 1865-2005, with the bulk of the material dating from 1981 to 2004. Three-fourths of the records are artists' artwork files, documenting the sale and consignment of nearly 6,500 works of art. The gallery's activities are also recorded through correspondence, client files, gallery invoices, inventories, business and financial records, printed materials, scrapbooks, photographic materials of artwork, and estate records for the John Marin estate and Sergio Stella estate (Joseph Stella). An addition of 10.2 linear feet, dated circa 1865 to 2005, includes artists' files arranged alphabetically containing printed material, clippings, exhibition announcements, and scattered correspondence and financial documents.