Open Geometric Structures: Five Geometric Structures and their Combinations 1979 Sol LeWitt Open Geometric Structures: Five Geometric Structures and their Combinations Offset on paper; staple bound 2 copies: 3 ¾ x 7 ¾ in. (9.5 x 19.7 cm), 36 pp. National Endowment for the Arts Museum Purchase Grant and Gift of the Men’s Council