Culture of Chicago Shore Drive, Crown Hall, 330 North Wabash, and the Kluczynski Federal Building. The tallest buildings in Chicago are Willis Tower, Trump Tower, the Aon Center, 875 North Michigan Avenue, and the Franklin Center. Willis Tower was originally named Sears Tower, and was the tallest building in the world from 1973 to 1998. It is now the second-tallest building in the United States, after One World Trade Center, though the height to the roof of Willis Tower is greater than that of One World Trade Center. Other architecturally significant modern and postmodern skyscrapers in Chicago include the Inland Steel Building, Marina
Center City Tower (Philadelphia) Center City Tower (Philadelphia) Center City Tower was the working name of a formerly proposed skyscraper in downtown Philadelphia. Designed and proposed by the firm now known as KlingStubbins (designers of Philadelphia's Penn Center and Bell Atlantic Tower), the building would have risen to a height of 1,050 feet (320 m) and 75 stories, making it the tallest building in The United States outside New York and Chicago, surpassing the height of the Bank of America Plaza in Atlanta. With a floor area of , it is one of the largest in Center City. The building was designed with an