with Hans Arp, George Braque, Alexandre Calder, Glorgio de Chirico, André Derain, Hans Erni, Max Ernst, Louis Fernandez, Alberto Giacometti, Julio Gonzalez, Juan Gris, Jean Hélion, Wassily Kandinsky, Paul Klee, Fernand Léger, Joan Miró, Piet Mondrian, Ben Nicholson, Amédée Ozenfant, Wolfgang Paalen, Pablo Picasso and Sophie Taeuber-Arp