Getting your Trinity Audio player ready...
A bird's-eye view of the construction of the Tribune Tower in 1924. The Wrigley Building is on the left.
A bird’s-eye view of the construction of the Tribune Tower in 1924. The Wrigley Building is on the left.
The Tribune Tower in 1924. It opened to the public by 1925.
The Tribune Tower in 1924. It opened to the public by 1925.
Joseph M. Patterson, left, and his cousin Col. Robert R. McCormick (in light-colored suit) lead the cornerstone-laying ceremony for the Tribune's printing plant in 1920. The printing press, built first, was attached to the east end of the Tower. The Tower opened in 1925.
Joseph M. Patterson, left, and his cousin Col. Robert R. McCormick (in light-colored suit) lead the cornerstone-laying ceremony for the Tribune’s printing plant in 1920. The printing press, built first, was attached to the east end of the Tower. The Tower opened in 1925.
The Tribune Tower under construction in 1924.
The Tribune Tower under construction in 1924.
An undated nighttime view of the Tribune Tower from Hubbard Street, west of Michigan Avenue.
An undated nighttime view of the Tribune Tower from Hubbard Street, west of Michigan Avenue.
The Wrigley Building, left, and the Tribune Tower, right, in 1935.
The Wrigley Building, left, and the Tribune Tower, right, in 1935.
The Tribune Tower, right, in 1945.
The Tribune Tower, right, in 1945.
Nighttime illumination highlights the Tribune Tower's flying buttresses and delicate Gothic ornamentation.
Nighttime illumination highlights the Tribune Tower’s flying buttresses and delicate Gothic ornamentation.
Medinah Athletic Club, from left, Tribune Tower, center, and the Wrigley Building as fog rolled in off Lake Michigan in April 1944.
Medinah Athletic Club, from left, Tribune Tower, center, and the Wrigley Building as fog rolled in off Lake Michigan in April 1944.
The scene at the Tribune dock on April 27, 1940, after the steamship Outarde, left, and the New York Daily News had docked with the first paper cargoes of the season. The Tribune Tower is on the left in the background.
The scene at the Tribune dock on April 27, 1940, after the steamship Outarde, left, and the New York Daily News had docked with the first paper cargoes of the season. The Tribune Tower is on the left in the background.
The Tribune Tower in 1942, with two women silhouetted in an arch of lower Wacker Drive in downtown Chicago.
The Tribune Tower in 1942, with two women silhouetted in an arch of lower Wacker Drive in downtown Chicago.
This picture, taken from an above platform on an observation area, shows the holiday crowds viewing the city below from the Tribune Tower in September 1931.
This picture, taken from an above platform on an observation area, shows the holiday crowds viewing the city below from the Tribune Tower in September 1931.
In this photo taken from a helicopter in 1949, you can see the annex to the Tribune, where the newsroom was housed.
In this photo taken from a helicopter in 1949, you can see the annex to the Tribune, where the newsroom was housed.
Aerial view of Chicago in 1948, including the Tribune Tower and the Wrigley Building.
Aerial view of Chicago in 1948, including the Tribune Tower and the Wrigley Building.
Mrs. Vincent Urba and her daughter Joyce, 6, are the last visitors on the Tribune Tower observation deck before it was closed on Aug. 10, 1956. Structural steel worker, Ray Sokey, will soon cut down the antenna. Keith Capron, building manager, escorted the pair to the observation area.
Mrs. Vincent Urba and her daughter Joyce, 6, are the last visitors on the Tribune Tower observation deck before it was closed on Aug. 10, 1956. Structural steel worker, Ray Sokey, will soon cut down the antenna. Keith Capron, building manager, escorted the pair to the observation area.
The Tribune Tower rises above the rubble of an 11-day-old fire at a cold storage warehouse at Rush and Hubbard streets which has held the interest of all of Chicago on Jan. 11, 1958.
The Tribune Tower rises above the rubble of an 11-day-old fire at a cold storage warehouse at Rush and Hubbard streets which has held the interest of all of Chicago on Jan. 11, 1958.
The view from the top of the Tribune Tower on March 7, 1962, was heavy with fog due to thawing temperatures. Tribune photographer Jack Mulcahy was setting up a long range camera when this picture was taken by fellow photographer Phil Mascione.
The view from the top of the Tribune Tower on March 7, 1962, was heavy with fog due to thawing temperatures. Tribune photographer Jack Mulcahy was setting up a long range camera when this picture was taken by fellow photographer Phil Mascione.
Policemen hold back crowds as President Nixon, center, leaves the Tribune Tower accompanied by Tribune executive Harold Grumhaus, second from left, on Sept. 17, 1970.
Policemen hold back crowds as President Nixon, center, leaves the Tribune Tower accompanied by Tribune executive Harold Grumhaus, second from left, on Sept. 17, 1970.
Daniel Nelson drove his Checker Cab up over the curb and parked it in the front entrance of the Tribune Tower on March 28, 1978.
Daniel Nelson drove his Checker Cab up over the curb and parked it in the front entrance of the Tribune Tower on March 28, 1978.
A 1978 view of the stonework on the upper floors of the Tribune Tower.
A 1978 view of the stonework on the upper floors of the Tribune Tower.
A 1972 view of the Michigan Avenue entrance to the baiduhai.
A 1972 view of the Michigan Avenue entrance to the baiduhai.
Ronald and Nancy Reagan arrive at the Tribune Tower for an interview after the GOP presidential candidate addressed the Veterans of Foreign Wars convention in McCormick Place on Aug. 18, 1980.
Ronald and Nancy Reagan arrive at the Tribune Tower for an interview after the GOP presidential candidate addressed the Veterans of Foreign Wars convention in McCormick Place on Aug. 18, 1980.