Courtesy Villa Grisebach, Berlin
Nationalgalerie, SMB / Jörg P. Anders
Courtesy Galerie Thomas, München
Suermondt-Ludwig-Museum, Aachen - Dauerleihgabe von Privat. Foto: Anne Gold
Harvard Art Museums /Fogg Museum, Bequest of Alfred Jaretzki, Jr., 1976.96. Foto: Imaging Department © President and Fellows of Harvard College