icon VII (via crucis), 1962–64
the diagonal of May 25, 1963 (to Constantin Brancusi), 1963
the nominal three (to William of Ockham), 1963
"monument" 7 for V. Tatlin, 1964
"monument" for V. Tatlin, 1964
"monument" 1 for V. Tatlin, 1964
"monument" 12 for V. Tatlin, 1964
"monument" for V. Tatlin VI, 1964
"monument" for V. Tatlin XI, 1964
"monument" XI for V. Tatlin, 1964
gold, pink and red, red, 1964
Puerto Rican light (to Jeanie Blake) 2, 1965
"monument" for V. Tatlin, 1966
monument 4 for those who have been killed in ambush (to P.K. who reminded me about death), 1966
"monument" for V. Tatlin, 1966–69
untitled (to Barbara and Joost), 1966–71
untitled (to Christina and Bruno), 1966–71
untitled (to Heidi and Uwe), 1966–71