The Library of the Tretyakov Gallery in Moscow contains over 50,000 books on Russian and foreign art. The collections date back to the gift, in 1899, of the library of P. M. Tretyakov. From 1918, the Library and the Gallery received the benefit of State support; the Library gained books from private collections and as a result of the closure of other museums, and it continued to receive donations. From 1931, copies of Russian publications on art were received on legal deposit, and many publications are additionally acquired in exchange for copies of the Gallery’s own publications. As well as books, the Library contains collections of manuscripts, of press-cuttings, and of exhibition invitation cards and posters. The Library maintains several card indexes, on Soviet art and the participation of Soviet artists in exhibitions, and of journal articles, illustrations, illustrators, and exhibition catalogues. The Library has itself published several reference books.