Editing Juan Gris (section)

==Designer and theorist==
In 1924, he designed ballet [[Stage set|sets]] and costumes for [[Sergei Diaghilev]] and the famous [[Ballets Russes]].<ref>Robert Craig Hansen, ''Scenic and costume design for the Ballets Russes'', Issue 30 of Theater and dramatic studies, UMI Research Press, 1 August 1985, p. 86, {{ISBN|0835716813}}</ref>

Gris articulated most of his aesthetic theories during 1924 and 1925. He delivered his definitive lecture, ''Des possibilités de la peinture'', at the [[University of Paris|Sorbonne]] in 1924.<ref name="Guggenheim" /> Major Gris exhibitions took place at the Galerie Simon in Paris and the Galerie Flechtheim in [[Berlin]] in 1923 and at the Galerie Flechtheim in [[Düsseldorf]] in 1925.<ref>José Pierre, ''Cubism'', Heron, 1969, p. 135</ref>