Leo Castelli (born Leo Krausz; September 4, 1907 – August 21, 1999) was an Italian-American art dealer. His gallery showcased cutting edge Contemporary art for five decades. Among the movements which Castelli showed were Surrealism, Abstract Expressionism, Neo-Dada, Pop Art, Op Art, Color field painting, Hard-edge painting,   Lyrical Abstraction, Minimal Art, Conceptual Art, and Neo-expressionism.