Kestner-Gesellschaft, Hannover; Kunsthalle Bern, Bern; Karl-Ernst-Osthaus-Museum, Hagen; Museum des 20. Jahrhunderts, Wien; Stedelijk Museum Amsterdam, Amsterdam; Moderna museet, Stockholm
Collection of Drawings of an Art Amateur made on his travels through a mysterious and faraway land, Karl Ernst Osthaus-Museum, Hagen / Salon de Fleurus, New York, 1999