As a symbol of modernism’s rise, you can’t really do better than the multi-level, cantilevered staircase in this elegant residence, a signature Breuer touch that would appear in many other residential projects. A collaboration between Breuer and Walter Gropius, the 12,000-square-foot home for a Pittsburgh industrialist and engineer was a synthesis of stone, rich wood paneling, and curves, furnished in custom Breuer furniture. As influential as the design and aesthetic proved to be, the home’s environmentally conscious construction—including a green roof and an energy conservation system that used water from the indoor pool to heat and cool the house—showcased just how far ahead of the game the Bauhaus duo was at the time.  Photo 3 of 12 in Design Icon: 10 Buildings by Marcel Breuer