[Madrid] The Museum of Modern Art (Museo de Arte Moderno or M.A.M.) was the Spanish national museum dedicated to 19th- and 20th-century painting. It was set up in 1894. It closed in 1971, when its 19th-century collections were merged into those of the Museo del Prado, but housed at the Casón del Buen Retiro, and its 20th-century collection...