A. R. Penck (Ralf Winkler)
Ralf Winkler, alias A. R. Penck, who also used the pseudonyms Mike Hammer, T. M., Mickey Spilane, Theodor Marx, "a. Y." or just "Y" was a German painter, printmaker, sculptor, and jazz drummer. Read more from Wikipedia →
Works by this artist in other museums: the Art Institute of Chicago, the Museum of Modern Art in New York.