List of tallest buildings
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of "The World's Tallest Building" and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at . The CTBUH only recognizes buildings that are complete however, and some buildings included within the lists in this article are not considered finished by the CTBUH.
List of tallest buildings in Chicago
Chicago, the third-largest city in the United States, is home to 1,315 completed high-rises, 44 of which stand taller than . The tallest building in the city is the 108-story Willis Tower (formerly the Sears Tower), which rises in the Chicago Loop and was completed in 1974. Sears Tower was the tallest building in the world from its completion, and remained the tallest building in the United States until May 10, 2013 when it was overtaken by One World Trade Center in New York City. The second-, third- and fourth-tallest buildings in Chicago are the Trump International Hotel & Tower, the Aon Center and 875 North Michigan Avenue, respectively. Of the ten tallest buildings in the United States, four are located in Chicago. Due to the contributions of Jeanne Gang and Natalie de Blois, Chicago has several of the tallest women-designed towers in the world. , the entire city had 105 buildings at least tall.