Fine Arts Museum, San Francisco / De Young Memorial Museum Dorint Collection, Berlin - Den Haag - Potsdam Walker Collection, Oakland Deutsche Bank Collection, Frankfurt Associated Arts, Amsterdam Phyllis Wattis Collection, San Francisco Wencel Collection, Chicago Holiday Inn, Leipzig InterContinental, Berlin Henry Nannen Collection, Kunsthalle in Emden Landesgirokasse, Stuttgart Lewis Collection, Los Angeles Landesmuseum Oldenburg (Oldb) Landeszentralbank Baden-Wuerttemberg Landeszentralbank Hannover Maritim ProArte, Berlin Pfalzgalerie Kaiserslautern Ministry for Art and Science State of Baden-Wuerttemberg (Germany) Museum Wiesbaden Oldenburgische Landesbank, Oldenburg (Oldb) Boeckmann Collection, Berlin Koenig Collection, Duisburg Reinheimer Collection, Sindelfingen State of Schleswig-Holstein Museum, Gottorf Palace (Germany) Stuttgart State Gallery City of Oldenburg Collection, Oldenburg (Oldb) City of Hannover Collection Schuette Collection, Essen Folkerts-Landau Collection, London Trepte Collection, Emsdetten Kleist Collection, Hamburg Politeo Collection, Zagreb Wuerth Collection, Kuenzelsau Mader Collection, Graefelfing