At the west end of the 3rd floor is El hombre controlador del universo (Man, controller of the universe- known as Man at the Crossroads), originally commissioned for New York's Rockefeller Center in 1933. The mural depicts a variety of technological and societal themes (such as the discoveries made possible by microscopes and telescopes) and was controversial for its inclusion of Lenin and a Soviet May Day parade. The Rockefellers were not happy with the painting and the incomplete work was eventually destroyed and painted over. Rivera recreated it here in 1934. On the north side of the third floor are David Alfaro Siqueiros' three-part La Nueva Democracía (New Democracy) and Rivera's four-part Carnaval de la Vida Mexicana (Carnival of Mexican Life); to the east is José Clemente Orozco's La Katharsis (Catharsis), depicting the conflict between humankind's 'social' and 'natural' aspects.