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Courtesy Villa Grisebach, Berlin

Collection Walker Art Center, Minneapolis. Gift of Mr. and Mrs. John Cowles, Sr. 1964

Mildred Lane Kemper Art Museum, Washington University in St. Louis. University purchase, Kende Sale Fund, 1946.

Kunsthalle Bremen – Der Kunstverein in Bremen. Foto: Lars Lohrisch

Saint Louis Art Museum, Bequest of Morton D. May 855:1983

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

Sprengel Museum Hannover, Kunstbesitz der Landeshauptstadt Hannover, Schenkung Volkswagenwerk GmbH, Wolfsburg (1956) / Ali

Courtesy Galerie Thomas, München

Collection Albright-Knox Art Gallery, Buffalo, New York. Room of Contemporary Art Fund, 1950 (RCA1950:1). Foto: Tom Loonan