© Staatsgalerie Stuttgart
Detroit Institute of Arts
Rheinisches Bildarchiv Köln, Beckmann, Max, Bildnis Gottlieb Friedrich Reber - rba_c000294
Lehmbruck Museum, Duisburg. Foto: Bernd Kirtz
Chicago, Art Institute of Chicago, Joseph Winterbotham Collection, 1988.220© 2018. The Art Institute of Chicago / Art Resource, NY / Scala, Florence