Section D'or

(French: “Golden Section”), group of Cubist painters concerned with the proportion and rhythm of geometric forms. The group's name was suggested by Jacques Villon, and the principal members included Robert Delaunay, Marcel Duchamp, Raymond Duchamp-Villon, Albert Gleizes, Juan Gris, Roger de La Fresnaye, Fernand Léger, André Lhote, Louis Marcoussis, Jean Metzinger, Francis