United States ; formerly known as the Standard Oil Building. Buildings whose construction is on-hold are also included. Koziarz, Jay (3 December 2018). A b c d "Willis Tower". "River East - River East Center". "Central Park - One Museum Park". Retrieved 24 December 2018. This building used the steel-frame method, innovated in Chicago. Of all the free pornofilm erotiek advertenties buildings that have held the title, only Willis Tower has also held the title of world's tallest building. A b "311 South Wacker Drive". 74.034 River East Center 644 (196) N 87375.5W /.89139N.618194W /.89139; -87.618194 (River East Center) 76.035 Grand Plaza I 641 (195) N 873743W /.89194N.62861W /.89194; -87.62861 (Grand Plaza I) 78.036 155 North Wacker 638. "New apartment tower ready to dig in along Printer's Row". Archived from the original on Retrieved "Chicago Plan Commission approves 800-foot riverfront office tower". Retrieved 16 September 2017. The clock tower on this building was removed in 1895, allowing a shorter building to become the tallest in the city.