“As postwar America sprouted suburban malls, urban parks, corporate compounds and federal urban renewal projects, Mr. Halprin helped forge a new, sharper style of landscape architecture, often as dependent on concrete as on vegetation. Places he shaped include Ghirardelli Square in San Francisco; Nicollet Mall in Minneapolis; a sequence of urban spaces with dazzling fountains in Portland, Ore.; a park atop a freeway in Seattle; and large plazas in Los Angeles.”