Burj Khalifa, earlier known as Burj Dubai, located in Downtown Dubai, UAE, and standing tall at 829.84m is the tallest man-made structure in the world. Burj Khalifa is as a living wonder, a stunning piece of art, and incomparable feat of engineering.Burj Khalifa forms a part of the new flagship development called Downtown Dubai, located at the First Interchange along Sheikh Zayed Road, in proximity to the main business district in Dubai. Developed by the leading developer Emaar Properties, the tower's architecture and engineering were handled by Skidmore, Owings and Merrill of Chicago. Samsung C&T of South Korea, who also built Taipei 101 and Petronas Twin Towers, was the primary contractor of this project. The Belgian group Besix and UAE's Arabtec, were the major sub-contractors.Construction of the project began on 21st September 2004. The project, worth US$1.5bn, was re-named Burj Khalifa, to honour the crucial support extended by the UAE President Khalifa bin Zayed Al Nahyan.