This masterpiece was designed by Ralph Adams Cram, a champion of the Gothic Revival style. It is the second-oldest building north of the river on Michigan Avenue; only the Water Tower and Pumping Station are older. The Tudor-style parish buildings were designed by Howard Van Doren Shaw. In 2012, the congregation dedicated an 80,000-square-foot addition, the Gratz Center, designed by Gensler. This bold contemporary addition to the Gold Coast is rhomboid in shape and clad in interlocking copper plates tinted a brilliant blue-green patina. The Gratz Center includes Buchanan Chapel, with a floor that incorporates a labyrinth modeled on the one at Chartres Cathedral in France.
