Tribune Tower is a neo-Gothic skyscraper located at 435 North Michigan Avenue in Chicago , Illinois , United States . Built between 1923 and 1925 , the international design competition for the tower became an historic event in 20th century architecture . The tower was the home of the '' Chicago Tribune '' , Tribune Media , and Tribune Publishing . WGN Radio ( 720 kHz ) originated broadcasts from the building until moving to 303 Wacker Drive in June , 2018 . The last WGN Radio broadcast emanated from the Tribune Tower on June 18 , 2018 . The ground level houses the large restaurant Howells & Hood ( named for the building 's architects ) , whose patio overlooks nearby Pioneer Court and Michigan Avenue . CNN 's Chicago bureau was also located in the building . It is listed as a Chicago Landmark and is a contributing property to the Michigan – Wacker Historic District . The original Tribune Tower was built in 1868 , but was destroyed in the Great Chicago Fire in 1871 . In early 2018 , work began on converting the entire office building into condominiums , expected to be completed by 2020
Great Chicago Fire
Great Chicago Fire
Tribune Tower