Christie's Images Limited © 2019. Christie's Images, London / Scala, Florence
Courtesy Galerie Thomas, München
Städel Museum, Frankfurt am Main - U. Edelmann / ARTOTHEK
Collection Walker Art Center, Minneapolis. Gift of Mr. and Mrs. John Cowles, Sr. 1964
Archiv Eigentümer(in) / Owner's archive
Courtesy Beck & Eggeling, Düsseldorf