THSA preserves the architectural, cultural and social history of America's theatres. Through its collections and publications, THSA makes available information on more than 15,000 theatres in the form of photographs, slides, negatives, books, blueprints, clippings, videos, printed programs, and other material on historic theatres, primarily in the U.S.
Museum of the City of New York: The archive includes set and costume drawings, posters, original playscripts, thousands of costumes and props, photographs, and a major Yiddish theater collection. Search theatre-related terms for great photographs
ARTstor has content related to theater and dance, including images of costumes, venues, and staged performances from around the world, as well as portraits and performance shots of notable playwrights, theater directors, choreographers, set and costume designers, actors, and dancers.
The V&A's Theatre Collections hold the UK's national collection of material about live performance in the UK since Shakespeare's day, covering drama, dance, musical theatre, circus, music hall, rock and pop, and other forms of live entertainment. The galleries display works of art, costumes, ephemera, video recordings, puppets, posters and photographs.