The International Style (aka minimalism) appeared in San Francisco in the 1960s via buildings like SOM’s Alcoa Building, with its strong external grid of seismic bracing, and the pure white curves of St. Mary’s Cathedral. In residential design, Eichlers were a modernist response to the need for post-WWII tract housing, emphasizing post-and-beam construction, indoor-outdoor relationships, and simple forms; in San Francisco, they can be found in Diamond Heights.