Exhibiting artists: Peter Blake, Alexander Calder, Gaston Chaissac, Salvador Dali, Willem de Kooning, Jean Dubuffet, Max Ernst, Barry Flanagan, Sam Francis, Alberto Giacometti, Ivon Hitchens, David Hockney, Howard Hodgkin, Paul Klee, Henri Laurens, Fernand Léger, Roy Lichtenstein, André Masson, Joan Miró, Henry Moore, Ben Nicholson, Pablo Picasso, Larry Rivers, Julian Schnabel, Cy Twombly, Andy Warhol, Tom Wesselmann and Jack B Yeats