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.
311 South Wacker Drive
311 South Wacker Drive is a post-modern 65-story skyscraper located in Chicago, Illinois and completed in 1990. At 961 feet (293 m) tall, it is the seventh-tallest building in Chicago and the 24th tallest in the United States. It was once the tallest reinforced concrete building in the world. Until 2015, 311 South Wacker was also the tallest building in the world known only by its street address, when it was surpassed in height by New York's 432 Park Avenue.