The Tribune Tower is a neo-Gothic building located at 435 North Michigan Avenue in Chicago, Illinois, USA.

Prior to the building of the Tribune Tower, correspondents for the Chicago Tribune brought back rocks and bricks from a variety of historically important sites throughout the world at the request of Colonel McCormick. Many of these reliefs have been incorporated into the lowest levels of the building and are labeled with their location of origin. Stones included in the wall are from such sites as the Trondheim Cathedral, Taj Mahal, Clementine Hall, the Parthenon, Hagia Sophia, Corregidor Island, Palace of Westminster, petrified wood from the Redwood National and State Parks, the Great Pyramid, The Alamo, Notre Dame de Paris, Abraham Lincoln’s Tomb, the Great Wall of China, Independence Hall, Fort Santiago, the Berlin Wall, Angkor Wat, Ta Prohm, and Banteay Srei among others.

Some of these had a political or social context such as the column fragment of Wawel Castle located in its own niche over the upper-left corner of the main entrance, as a visual tribute to Chicago's large Polish populace, the largest such presence outside of the Republic of Poland. There are 136 fragments in the building. More recently a rock returned from the moon was displayed in a window in the Tribune giftstore (it could not be added to the wall as NASA owns all moon rocks, and it is merely on loan to the Tribune), and a piece of steel recovered from the World Trade Center has been added to the wall.

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.

en.wikipedia.org/wiki/Tribune_Tower