Roerich, Bakst and Dobuzhinsky taught him; Guro and Matyushin were fellow-students. Before he left for Paris, he shared a studio and took drawing classes with Nijinsky. Apollinaire, Cendrars, Ehrenburg, Léger and Delaunay became friends when he settled in Paris: also Salmon, Laurens, Modigliani and Soutine. Cendrars helped him find titles for his paintings. In post-Revolutionary Vitebsk, he taught with Malevich and Lissitzky, but Malevich disagreed on fundamental principles (Lissitzky siding with him), and made Chagall’s position untenable. He collaborated with Massine in New York though primarily exiled in France.