Pathways and Parallels: Roads to Abstract Expressionism, Hollis Taggert Galleries, New York
American Modernists, University of Wyoming Art Museum, Laramie, WY
Collezione La Gaia, Centro Sperimentale, Caraglio, Italy
2007/08
From Riot to Structure – Writing in Informel Art, Gustav Lübcke-Museum, Hamm, Germany
Guests from the Museum Folkwang Essen, Josef Albers-Museum, Bottrop, Germany
2008
Notation – Kalkül und Form in den Künsten, Akademie der Künste, Berlin, Germany
Surreale Welten – Sammlung Scharf-Gerstenberg, Nationalgalerie Staatliche Museen zu Berlin
Shining Spirit: Westheimer Family Collection, Oklahoma City Museum of Art
Druckstelle. Graphik von Chillida bis Uecker, Staatliche Kunstsammlungen, Dresden, Germany
2009
The Artist Traveller, Museo d’Arte, Ravenna, Italy
Notation – Kalkül und Form in den Künsten, Center for Art and Media, Karlsruhe, Germany
The Third Mind: American Artists Contemplate Asia, 1860 to 1989, Guggenheim Museum, New York
The Roundhouse of International Spirits:Arp, Benazzi, Bissier, Nicholson, Richter, Tobey, Valenti in the Ticino, Kettle’s Yard, Cambridge, Great Britain
The power of place, Museo comunale d’arte moderna, Ascona; Pinacoteca Casa Rusca, Locarno, Switzerland
Themes and Variations, Peggy Guggenheim Collection, Venice Italy
Abstracta, Galleria Torbandena, Trieste Italy
Synchronies: Undercurrents in Postwar European and American Abstraction, Hackett Freedman Gallery, San Francisco
Italo Valenti, Jean Arp, Julius Bissier, Mark Tobey, Galerie Une, Auvernier-Neuchâtel, Switzerland
Masterpieces of the Modern. The Collection of the Kunstmuseum Winterthur, Kunst- und Ausstellungs-Halle der Bundesrepublik Deutschland, Bonn, Germany; Museo d’Arte Moderna e Contemporanea, Trento and Rovereto, Italy