In 1922, the Chicago Tribune newspaper hosted an international design competition for its new headquarters, and offered $100,000 in prize money with a $50,000 1st prize for "the most beautiful and distinctive office building in the world". The competition worked brilliantly for months as a publicity stunt, and the resulting entries still reveal a unique turning point in American architectural history. More than 260 entries were received. The winner was the 36 floor neo-Gothic design by New York architects John Mead Howells and Raymond Hood, with buttresses near the top. Construction was started in 1923 and completed in 1925. The Tribune Tower building is located at 435 North Michigan Avenue in Chicago, Illinois. It is the home of the Chicago Tribune and Tribune Company. WGN Radio (720 kHz) broadcasts from the building, with ground-level studios overlooking nearby Pioneer Court and Michigan Avenue. CNN's Chicago bureau is located in the building. It is listed as a Chicago Landmark and is a contributing property to the Michigan–Wacker Historic District.