Approximately 1,000 architectural drawings, circa 1880-1959, with related correspondence, clippings, announcements, specifications, legal documents, and photographs. Major projects represented include Auldbrass Plantation, Yemasee, S.C; the Guggenheim Museum, New York City; Fallingwater (the Edgar J. Kaufmann residence), Bear Run, Pa.; and Wright's own home and studio in Oak Park, Ill. Also, Wright's correspondence relating to exhibits and publication of his work; other professional matters; and correspondence with his son, John Lloyd Wright, 1920s-1950s; manuscript, typescript, and printed versions of articles and addresses by Wright; photographs, programs, invitations, issues of SQUARE-PAPERS, and other materials, circa 1920s-1940s, relating to Taliesin; and miscellaneous invitations, programs, announcements, honors, appreciations, memorials, clippings, and other documents relating to various aspects of Wright's career.