The Wrigley Tribune Buildings and the Sheraton Hotel, Chicago, Illinois. The Tribune Tower is a neo-Gothic building located at 435 North Michigan Avenue in Chicago, Illinois. Built in 1925. (right) The Wrigley Building 400-410 North Michigan Avenue, the corporate headquarters of the Wrigley Company. Built in 1921. (left) The Sheraton Hotel (Now the InterContinental Hotel) South Tower building. 471 foot, 42 story building which was completed in 1929. (centre)