David Alfaro Siqueiros (born José de Jesús Alfaro Siqueiros, December 29, 1896, in Chihuahua - January 6, 1974, in Cuernavaca, Morelos) was a Mexican social realist painter, better known for his large murals in fresco. Along with Diego Rivera and José Clemente Orozco, he established "Mexican Muralism." He was a Marxist-Leninist in support of Stalin and a member of the Mexican Communist Party who participated in an unsuccessful attempt to assassinate Leon Trotsky in May 1940.