MINNEAPOLIS, MN.- When the Walker Art Center opened its new Edward Larrabee Barnes–designed building in 1971, it ushered in exciting new possibilities for exhibiting and collecting the art of its time. The Barnes building, with its sweeping, rectangular galleries and white terrazzo floors, was one of the first U.S. museums designed to showcase sculpture and other works that abandoned the pedestal to be shown directly on the floor, resulting in a more direct relationship between viewer and object. Many of these works were made by artists associated with American Minimalism and Conceptualism, two areas in which the Walker was steadily building its collection. As a major figure in both movements, Sol LeWitt (1928–2007) was one of the first artists whose work graced the Barnes building. LeWitt and the Walker enjoyed a relationship that