Two cards announcing the opening of René Block Gallery's New York gallery and the opening of its inaugural exhibition held September 14 - November 2, 1974. Artists included: Joseph Beuys, George Brecht, Giuseppe Chiari, Robert Filliou, Ludwig Gosewitz, Al Hansen, Dick Higgins, Ray Johnson, Allan Kaprow, Alison Knowles, Arthur Koepcke, Nam June Paik, Diter Rot, Thomas Schmit, Wolf Vostell, Robert Watts and Emmett Williams.