Düren, Leopold Hoesch Museum. Foto: Aachen, Peter Hinschläger
Courtesy Galerie Thomas, München
Sprengel Museum Hannover / Michael Herling / Aline Gwose
Saint Louis Art Museum, Bequest of Morton D. May 851:1983
Kunsthalle Mannheim, Foto: Cem Yücetas
Wiesbaden, Frank Brabandt
Museum Folkwang Essen / ARTOTHEK
2013 Christie's Images Limited
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