Saint Louis Art Museum, Bequest of Morton D. May 841:1983

New York, Neue Galerie

New York, Museum of Modern Art (MoMA), Given anonymously (by exchange), 6.1942.a-c.© 2018. Digital image, The Museum of Modern Art, New York / Scala, Florence

Ahlen, Kaldewei Kulturstiftung. Foto: Fotoatelier Schälchli, Zürich

Sprengel Museum Hannover, Leihgabe Niedersächsisches Landesmuseum, Hannover / Michael Herling / Aline Gwose

Nationalgalerie, SMB / Jörg P. Anders

Boston, Museum of Fine Arts