OSTEN, Gert von der and Horst Keller. (Josef Albers, Carl Andre, Horst Antes, Shusaku Arakawa, Allan D'Arcangelo, Arman (Armand Fernandez), Richard Artschwager, Joe Baer, Larry Bell, Miguel Berrocal, Joseph Beuys, Peter Blake, Gernot Bubenik, Anthony Caro, John Chamberlain, Dan Christensen, Alex Colville, Carlos Cruz-Diez, Ronald Davis, Jim Dine, Jean Dubuffet, Richard Estes, Oyvind Fahlstrom, Dan Flavin, Lucio Fontana, Domenico Gnoli, Bruno Goller, Robert Graham, Nancy Stevenson Graves, Gunter Haese, Richard Hamilton, Hans Hartung, Erwin Heerich, Eva Hesse, David Hockney, Robert Indiana, Jasper Johns, Allen Jones, Donald Judd, Howard Kantovitz, Ellsworth Kelly, Edward Kienholz, R. B. Kitaj, Konrad Klapheck, Yves Klein, Yayoi Kusama, Sol Lewitt, Roy Lichtenstein, Richard Linder, Morris Louis, Heinz Mack, Piero Manzoni, Marisol (Escobar), Malcolm Morley, Robert Morris, Bruce Nauman, Louise Nevelson, Kenneth Noland, Claes Oldenburg, Eduardo Paolozzi, Pablo Picasso, Michelangelo Pistoletto, Robert Rauschenberg, Martial Raysse, Gerhard Richter, Jean-Paul Riopelle, James Rosenquist, Niki de Saint Phalle, Nicolas Schoffer, Bernhard Schultze, George Segal, Richard Serra, Keith Sonnier, Pierre Soulages, Daniel Spoerri, Lawrence Stafford, Lewis Stein, Frank Stella, Antoni Tapies, Paul Thek, Wayne Thiebaud, Jean Tinguely, Richard Tuttle, Cy Twombly, Gunther Uecker, Ursula [Schultze-Bluhm], Victor Vasarely, Wolf Vostell, Franz Erhard Walther, Andy Warhol, Tom Wesselmann, Wols (Wolfgang Schulze)