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.
Taipei 101
Upon its completion, Taipei 101 was the world's tallest inhabited building, at as measured to its height architectural top (spire), exceeding the Petronas Towers, which were previously the tallest inhabited skyscraper at . The height to the top of the roof, at , and highest occupied floor, at , surpassed the previous records of and , respectively; the Willis Tower had previously held that distinction. It also surpassed the 85-story, Tuntex Sky Tower in Kaohsiung as the tallest building in Taiwan and the 51-story, Shin Kong Life Tower as the tallest building in Taipei. Taipei 101 claimed the official records for the world's tallest sundial and the world's largest New Year's Eve countdown clock.