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akg-images 3929242

Courtesy Thomas Ammann Fine Art AG

Staatliche Kunsthalle Karlsruhe. Foto: A. Fischer / H. Kohler

Nationalgalerie, SMB / Jörg P. Anders

Museum Folkwang Essen / ARTOTHEK

London, Marie-Louise von Motesiczky Charitable Trust

2013 Christie's Images Limited

Boston, Museum of Fine Arts

Minneapolis, Institute of Art

Courtesy Hauser & Wirth Collection Services

Washington D. C., Smithsonian Institution, Hirshorn Museum and Sculpture Garden. Gift of the Joseph H. Hirshhorn Foundation, 1966. Foto: Lee Stalsworth

Saint Louis Art Museum, Bequest of Morton D. May 867:1983