Art Institute of Chicago
Berkeley Art Museum, Calif.
Buffalo AKG Art Museum (formerly Albright-Knox Art Gallery)New York
Chazen Museum of Art, Madison Wis.
Harvard Art Museums, Busch-Reisinger Museum, Cambridge, Mass.
Harvard Art Museums, Fogg Museum, Cambridge, Mass.
Museum of Fine Arts, Houston
Newfields (formerly Indianapolis Museum of Art)
Rose Art Museum, Brandeis University Waltham, Mass.
The Menil Collection Houston
The Phillips Collection, Washington, D.C.
Yale University Art Gallery, New Haven

Aargauer Kunsthaus, Aarau, Switzerland
Fotomuseum Winterthur
Kolumba, Cologne
Kunsthaus Zürich
Kunstmuseum Bonn
Kunstmuseum Olten, Switzerland
Kunst Museum Winterthur, Switzerland
Lenbachhaus, Munich
Museum Haus Konstruktiv, Zürich
Osthaus Museum Hagen, Germany
PEAC Museum (formerly Kunstraum Alexander Bürkle), Freiburg, Germany
Schweizerische Nationalbibliothek, Graphische Sammlung, Bern

Werner Kramarsky, New York
Bank Sarasin, Basel
National Versicherung, Basel
Collection Panza di Biumo, Varese