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Burj Khalifa (Arabic: برج خليفة "Khalifa Tower"),[3] formerly known as Burj Dubai, is a skyscraper in Dubai, United Arab Emirates, and is the tallest man-made structure ever built, at 828 m (2,717 ft).[3] Construction began on 21 September 2004, with the exterior of the structure completed on 1 October 2009 and the building officially opened on 4 January 2010.[1][7] The building is part of the 2 km2 (490-acre) flagship development called Downtown Burj Khalifa at the "First Interchange" along Sheikh Zayed Road, near Dubai's main business district. The tower's architect and engineer is Skidmore, Owings and Merrill, LLP (Chicago).[8] Bill Baker, the Chief Structural Engineer for the project, invented the buttressed core structural system in order to enable the tower to achieve such heights economically. Adrian Smith, who worked with Skidmore, Owings and Merrill (SOM) until 2006, was the Design Partner on the project.[8][9]Source: Wikipedia - Burj Khalifa
