This famous Modernist plaza, home of Chicago’s Picasso sculpture, was rehabilitated after 35 years with expanded plantings and seating. Limited by an underground structure, Hoerr Schaudt replaced excess soil in deep planters with lightweight fill to allow increased size and number of trees. With new amenities, plaza usage exploded as the interlocking grove of hand-selected 35-foot tall honey locusts invited shade in hot, summertime Chicago.