Sprengel Museum Hannover / Aline Herling / Michael Herling / Benedikt Werner

Museum Osthaus, Hagen. Foto: Achim Kukulies, Düsseldorf

© Staatsgalerie Stuttgart

Mark Ranney Memorial Fund 1946.1 - University of Iowa City Museum of Art. Reproduced with permission from The University of Iowa

Saarlandmuseum Saarbrücken, Stiftung Saarländischer Kulturbesitz. Foto: Tom Gundelwein

Hilti Art Foundation, Schaan, Liechtenstein

Von der Heydt-Museum Wuppertal. Foto: Antje Zeis-Loi, Medienzentrum Wuppertal

Archiv Eigentümer(in) / Owner’s Archive. Foto: Peter Schälchli, Zürich

Kansas City, Missouri, The Nelson-Atkins Museum of Art. Gift of the Friends of Art, 54-86. Image courtesy Nelson-Atkins Media Services / Photo: Jamison Miller

Fort Dodge, Blanden Art Museum

Kunstmuseum Winterthur

Courtesy Metropolitan Museum, New York (Sabine Rewald)