This lecture is largely about Kiesler’s relationship to the avantgardes that sought refuge in New York, notably with the Surrealists. Kiesler’s friendship with Marcel Duchamp changes his thinking in many ways. He develops his own theory, Correalism. The Vision Machine is a theoretical construct that deals with both vision as seeing as well as how this seeing is turned into a vision. The exhibition Art of this Century for Peggy Guggenheim and the Surrealist Exhibition in Paris are remarkable spatial experiences, in which art and architecture meld. The Endless House is the culmination of all his theories and experiences. The body always takes central stage.