Düren, Leopold Hoesch Museum. Foto: Aachen, Peter Hinschläger
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
Courtesy Thomas Ammann Fine Art AG
Leipzig, Museum der bildenden Künste
Museum Folkwang Essen / ARTOTHEK
Courtesy Hauser & Wirth Collection Services