A counterattack to the uniformity of the International Style, postmodern architecture can literally be a mixed bag of classical and modern references, and the reception has been similarly mixed. But Mario Botta’s SFMOMA, with its brick rectangles surrounding a round black-and-white striped turret, definitely stands out from the crowd. The city also has 580 California, a high-rise by famed postmodern architect Philip Johnson, which has a glass mansard roof ringed with 12-foot-tall faceless statues.