This internationally renowned Modernist plaza – the home of Chicago’s iconic Picasso sculpture – received its first rehabilitation in 35 years with expanded plantings and seating. In response to restrictions imposed by an underground structure, Hoerr Schaudt replaced excess soil in deep planters with lightweight fill to permit a greater number of larger trees. The interlocking grove of hand-selected 35-foot-tall honey locusts brought shade to summertime Chicago – and revivified one of the Midwest’s great urban spaces.