Barrel-vault form used at 54-56 Addison Street, built 1968, Diamond Heights Redevelopment Area. Google streetview. Posted on 15 March 201915 March 2019 by Sunnyside History Barrel-vault form used at 54-56 Addison Street, built 1968, Diamond Heights Redevelopment Area. Google streetview. Published by Sunnyside History View all posts by Sunnyside History