AT&T Corporate Center

The AT&T Corporate Center is the 4th tallest completed skyscraper in Chicago in Cook County, Illinois, United States and the 9th tallest in the United States at a height of 1,021 ft (307 m) containing 60 floors.Completed in 1989, the 1.7 million square foot (158,000 m²) supertall building stands two blocks east of the Chicago River and northeast of the Sears Tower at 227 West Monroe Street (100 South Franklin alternate address) in the Loop community area of downtown Chicago. Composed of retail and commercial office space, the tower is the tallest building constructed in Chicago in the last quarter of the 20th century. The building was built to consolidate American Telephone & Telegraph Company central regional headquarters offices.





The building features an elaborate 60th floor conference center, a lobby-level 650-seat restaurant, a 23,000-square-foot (2,100 m2) retail concourse on two levels, and a 170-car 24-hour parking facility on the lower two levels. The building lobby extends all the way through the block to connect with the nearby USG Building. An atrium links between them.




Designed by Adrian D. Smith of Skidmore, Owings & Merrill, the AT&T Corporate Center, named after AT&T, is one of the most famous and recognized buildings in Chicago. The building's form features setbacks at the 15th, 30th and 45th floors. Designed in the postmodern architectural style, it is a granite-clad steel-framed building resting on pile foundations. The structure is characterized by strong vertical lines, spiked roof pinnacles, granite cladding and setbacks. The granite is a deep red color at the base, but changes shade to rose-beige at the top. Above the 5th floor, the lighter rose-beige granite is protected by silk-screened aluminum panels. The building relies on Gothic detailing to showcase verticality. The building's verticality evokes images of 1920s buildings, and the sturdiness of the structure is reminiscent of the Chicago Board of Trade Building. In addition to its design, the building relies on its location at the farthest corner from the Sears Tower to set it apart.