Ribbons is a landscape sculpture that transforms the open-air courtyard of 50 United Nations Plaza, part of a National Historic Landmark of the San Francisco Civic Center. It is the centerpiece of the U.S. General Service Administrations’ historic Deep Green renovation of their Pacific Rim Headquarters. Ribbons integrates contemporary sculpture and sustainable strategies with the building’s historic Beaux-Arts architecture through a horizontal arrangement of sculptures made from cast, recycled concrete benches and carved granite fountains. Rising from paving ribbons, the landscape sculpture forms a rhythmic circulation system of permeable decomposed granite paving within a grove of Himalayan White Birch, with and understory of Heuchera, Deer Fern and an edge of Cape Rush. The project creates an exciting contemporary visual language that belongs to the historic fabric of the existing building as well as meets the GSA’s aggressive sustainability requirements for this LEED Platinum project.