Burj Khalifa or "Khalifa Tower" is a very tall skyscraper in Dubai, United Arab Emirates and is the world's tallest man made building ever built. Before the building opened, it was called Burj Dubai. The building is 160 stories high. Construction of the tower was started in 2004. The building was officially opened on 4 January 2010.[1][2] It is the tallest structure made by humans in the world. The building is more than 300 metres (980 ft) taller than Taipei 101. Taipei 101 was the tallest building until 2010 before Burj Khalifa was built.

Adrian Smith designed the tower.[3] He worked with Skidmore, Owings and Merrill (SOM) until 2006.[4] It was built by Samsung Engineering & Constructio], Besix, and Arabtec.[5] The tower cost US $1.5 billion to build.[6] The building is part of a 2 km building project on Sheikh Zayed Road, Downtown Burj Khalifa. It is near Dubai's main business district.