To many architects and critics who celebrated its completion in 1968, Chicago’s Blue Cross-Blue Shield Building at 55 W. Wacker was an architectural milestone in a downtown business district reinventing itself after decades of creative and economic stagnation. Designed by architect Otto Stark of the Chicago-based firm C.F. Murphy Associates, the Brutalist-style Blue Cross-Blue Shield Building was called by Architectural Record a “muscular, positive architectural statement.”