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Lawrence Halprin, the influential landscape architect of the post WWII generation, and his creation of the striking plazas of the Portland Open Space Sequence. Between 1963 and 1970, Lawrence Halprin and Associates realized a quartet of public plazas in Portland, Oregon, that redefined the city and set a bold new precedent for urban landscape architecture. Dubbed the Portland Open Space Sequence and composed of the Lovejoy Fountain, Pettygrove Park, and Forecourt Fountain (later renamed Ira Keller Fountain), plus the lesser known Source Fountain, the plazas were a dynamic collage of striking concrete forms, gushing water, and alpine flora that, in their seamless mix of nature and theater, created a playful metaphorical watershed coursing through the central city.