Swann was founded in 1941 as an auction house specializing in Rare and Antiquarian Books and is now the largest specialist auctioneer of Works on Paper in the world. Swann conducts approximately 40 sales a year, with departments devoted to Books, Autographs, Maps & Atlases, Photographs & Photobooks, Prints & Drawings, Vintage Posters, African-American Fine Art and Illustration Art. On March 27, 2017, Swann celebrated 75 years of auctions.