Burj Khalifa is a skyscraper in the city of Dubai in the United Arab Emirates. Construction began on 21 September 2004. On 21 July 2007 the Burj Khalifa took over the title 'tallest building in the world' from the Taipei 101 in Taiwan. On 17 January 2009 the tower reached its highest point, with a height of 828 meters. Including antennas and flagpoles, the height is 829.8m. The building was opened with grand fireworks on 4 January 2010.
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