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
Taipei 101 / TAIPEI 101, formerly known as the Taipei World Financial Center – is a landmark supertall skyscraper in Xinyi District, Taipei, Taiwan. The building was officially classified as the world's tallest from 2004 until the 2010 completion of the Burj Khalifa in Dubai. In 2011, the building received Platinum certification under the Leadership in Energy and Environmental Design (LEED) rating system, and became the tallest and largest green building in the world. At one point it had the fastest elevator in the world, traveling at and transporting passengers from the 5th to 89th floor in 37 seconds.