You might like Left Right Gilbert and George Andy Warhol 1975 England 1968 Richard Long CBE 1968 The Diamond Cutter’s Wedding Dennis Oppenheim 1980 A Hundred Mile Walk Richard Long CBE 1971–2 Salt Flat Dennis Oppenheim 1968 Site Sculpture Project, Windham College Pentagon, Putney, Vermont Douglas Huebler 1968 Untitled Richard Long CBE 1967 Directed Harvest Dennis Oppenheim 1966 Reverse Processing, Cement Transplant, East River, NY, 1970 Dennis Oppenheim 1978 Parallel Stress Dennis Oppenheim 1970 Constellations Martin Cullen c.1992 Aligning: Balls John Baldessari 1972