Welcome to 330 N. Wabash, formerly known as the IBM building. It was designed by legendary architect Ludwig Mies van der Rohe. Mies emigrated to the United States in 1937 fleeing Nazi Germany. His characteristic style was modern and minimalistic, dubbed the International Style. In Chicago, he led the architecture program at the Illinois Institute of Technology and designed several prominent buildings, including the Federal Plaza buildings and 860-880 Lake Shore Drive.
He also designed his own line of furniture for the lobbies of his buildings. 330 N. Wabash currently feature replicas of his originals. However, as I discovered very uncomfortably, the cushions are actually cast in bronze.