Note X, State II, 1968
Barnett Newman
Untitled (Grupo Frente), 1955
Hélio Oiticica
Untitled (Metaesquema), 1958
Hélio Oiticica
Tube Supported by Its Contents, 1969
Claes Oldenburg
Proposed Colossal Monument for the Battery, NYC - Vacuum Cleaner, View from Upper Bay, 1965
Claes Oldenburg
1965/1-00 (Detail 2328296 - 2330824), early 1970s
Roman Opalka
Girlfriends I (Freundinnen I), 1967
Sigmar Polke
Concert Drawing #1, 1966
Larry Poons
The Shield, 1962
Mel Ramos
Untitled, 1939
Ad Reinhardt
Projected Plan for 42 Photographs Tri-Axial Rotation of a Cube, 1966
Mel Bochner
Untitled (Study for Isomorphic Circles), 1967
Mel Bochner
Untitled, n.d.
Fred Sandback
Untitled (Study for Fence Piece), 1966
Mel Bochner
Untitled (Study for 3 x 3), 1966
Mel Bochner
Untitled (Study for 8-Part Progression), 1966
Mel Bochner
Untitled (No. 33 from 133 proposals for the Heiner Friedrich Gallery), 1969
Fred Sandback
Untitled (No. 35 from 133 proposals for the Heiner Friedrich Gallery), 1969
Fred Sandback
Untitled (No. 37 from 133 proposals for the Heiner Friedrich Gallery), 1969
Fred Sandback