541 N Fairbanks — Day 105 / by Adrian Galli

541 North Fairbanks Court, formerly the Time-Life Building, is a 404-foot-tall (123 m), 30-story skyscraper in Chicago, Illinois, designed by Harry Weese and completed in 1969. The 27-foot-high (8.2 m) lobby has a base of 87 feet (27 m) with 30-foot-wide (9.1 m) bay windows.

The structure is clad in Cor-Ten steel, the material used for the Daley Center and the Picasso sculpture in the Center's plaza. The metal rusts with age, an effect intended by the architects. The lobby floor is ½ level below ground, and an underground retail concourse is found another half level below. The coffered ceilings in the lobby and outdoor arcade are similar to Washington, D.C.'s subway system, designed by the same architect.

Source