Tribune Tower

In addition to 9,316 tons of steel, the neo-Gothic icon features extensive carvings by the American artist Rene Paul Chambellan--among them, images of Robin Hood and a howling dog in honor of the architects. When it opened in 1925, Col. Robert R. McCormick called it "the most beautiful office building in the world."

See more buildings. bridges, and innovations from the Roaring Twenties in our 1920s timeline, part of our yearlong celebration of AISC's Centennial!