Memling Dawn, 1951
Untitled, 1954
Untitled, 1954 c.
The Paradoxical Absolute, 1958
Untitled, 1959
Etretat, 1960
Untitled, 1960
The Goodies, 1961
Clutching, 1962
Inner Ear, 1962
Labyrinthine Tower, 1962
Lair, 1962
Untitled, 1962 c.
Fée couturière, 1963
Stretched Drawing [5 x 5 grid], 1963
the diagonal of May 25, 1963 (to Constantin Brancusi), 1963
Stretched Drawing [2 x 2 grid], 1963 c.
Stretched Drawing [Square], 1963 c.
Amoeba, 1963–65
gold, pink and red, red, 1964
The Quartered One, 1964–65
La Patte, 1965
Untitled, 1965
Untitled, 1965–66 c.
Untitled, Delta, 1965–66 c.
JUNE 16, 1966, 1966
monument 4 for those who have been killed in ambush (to P.K. who reminded me about death), 1966
The Open Hand (variant), 1966
Untitled, 1966
untitled (to Katharina and Christoph), 1966–71
End of Softness, 1967
FEB. 14, 1967, 1967
Germinal, 1967
Scatter Piece, 1967
Unconscious Landscape, 1967–68
North, East, South, West, 1967/2002
5 ABR. 68, 1968
Gravel Mirrors with Cracks and Dust, 1968
Hanging Janus with Jacket, 1968
Janus, 1968
Janus in Leather Jacket, 1968
ONE QUART EXTERIOR GREEN INDUSTRIAL ENAMEL THROWN ON A BRICK WALL, 1968
Raum 19, 1968
The Fingers, 1968
Three Roses, 1968
Medway, 1968 c.
Avenza Revisited II, 1968–69
Standing Walls I, 1968/2017
Closed Mirror Square (Cayuga Salt Mine Project), 1969
Declaration of Intent, 1969
Leaning Mirror, 1969
Map of Broken Glass (Atlantis), 1969
NOV. 20, 1969, 1969
untitled, 1969
Untitled (from 133 Proposals for Heiner Friedrich Gallery), 1969
Water Composition (yellow/green), 1969–70/2018
Water Composition (multi color), 1969–70/2021