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.
Architecture of New York City
The World Trade Center's twin towers were the city's tallest buildings from 1973 until their destruction in the September 11 attacks. The towers rose 1,368 feet (417 m) and 1,362 feet (415 m) respectively, both 110 Floors. The North Tower's 360 foot antenna housed most of the city's communications, while the South Tower was home to a popular observation deck. They were the tallest buildings in the world until Chicago's 1,454-foot Sears Tower was completed in 1974.