The National Congress of American Indian (NCAI), founded in 1944, is the oldest nation-wide American Indian advocacy organization in the United States. The NCAI records document the organization's work, particularly that of its office in Washington, DC, and the wide variety of issues faced by American Indians in the twentieth century. The collection is located in the Cultural Resource Center of the National Museum of the American Indian.

The Morris Louis and Morris Louis Estate papers measure 17.8 linear feet and date from circa 1912-2007, with the bulk of the material dating from 1965-2000. The collection documents Morris Louis' career as a Color Field painter and founding participant in the Washington Color School, as well as the subsequent administration of his estate by his wife Marcella Brenner. Found within Morris Louis' papers are biographical materials, correspondence, photographs, scattered financial records, notes, writings, printed materials, and a canvas sample. The Morris Louis Estate papers include records of gallery exhibitions, mostly André Emmerich Gallery; artwork inventories; legal records concerning the lawsuit Bernstein v. Brenner; financial records of the sale of Louis' artwork; printed materials; writings about Louis; photographs of exhibition installations and artwork; and project files which include documentation of film projects by Robert Pierce Productions, a catalog raisonne, documentation of PBS documentaries, video recordings of the exhibition "Morris Louis Now", and numerous sound recordings of interviews with artists discussing Morris Louis conducted by Anita Faatz.

The Marcel Breuer papers, 1920-1986, contain biographical material, correspondence, business and financial records, interviews, notes, writings, sketches, project files, exhibition files, photographs, and printed material that document the career of architect and designer Marcel Breuer.

The Jack Lenor Larsen papers measure 3.7 linear feet and date from 1941-2003. Larsen was a renowned weaver and designer, entrepreneur, and a scholar who wrote and lectured on modernist design. His career in the New York design world is documented by biographical materials, correspondence, writings by and about him, various printed materials and photographs.

The records of Jacques Seligmann & Co. measure approximately 203.1 linear feet and date from 1904 to 1978, with bulk dates from 1913 to 1974. The collection includes extensive correspondence files, reference material on American and European collectors and their collections, inventory and stock records, financial records, exhibition files, auction files, and the records of subsidiary companies. The collection is an invaluable resource in tracing the provenance of particular works of art and provides a comprehensive view of the activities of collectors and art dealers in the years leading up to and following World War II.

The papers of New York painters and teachers Josef Presser and Presser's wife Agnes Hart measure 4.3 linear feet and date from 1913 to 1980, with the bulk of the material from 1940 to 1980. The collection documents their personal and professional lives as artists and educators and consists of biographical material, business and personal correspondence, teaching files, printed material, and scattered photographs. The collection also includes writings, personal business records, and artwork by Presser.

The papers of New York photographer and filmmaker Hans Namuth measure 4.5 linear feet and date from 1945 to 1985. The bulk of the collection consists of photographs taken by Namuth of New York artists. Also included are papers regarding Namuth's film about Alfred Stieglitz and other professional files.

This collection is composed entirely of xerographic and photographic reproductions made for the Robert Mills Papers Project. The copies include correspondence, plans, federal legislation regarding proposed government construction projects, construction records, and material regarding people with a relation to Mills or one of his projects. The mat...

Photographs and a lithograph probably collected by W J McGee during the first decade of the 20th century. The photographs were probably made by Bailey Willis during his 1903 expedition to China and were collected by W. J. McGee for his US Department of Agriculture bulletin on Soil Erosion (1911). Photos document terraced rice fields in China. The l...

The papers of painter, illustrator, muralist, and political activist William Gropper measure 3.3 linear feet and date from 1916-1983. Almost one-half of the collection consists of printed materials, including full issues of New Masses, Liberator, and Der Hammer, all featuring illustrations by Gropper. Circa 600 letters include those written to Gropper by Frank Crowninshield, Robert Henri, Louis Lozowick, Raphael Soyer, and others. Also found are photographs of Gropper, his family, colleagues, and friends, as well as scattered writings and notes, business records, biographical information, three drawings, and a fabric sample designed by Gropper.