Dubai, the largest city in the United Arab Emirates, is home to 911 completed high-rises, 88 of which stand taller than 180 metres (591 ft). The tallest building in Dubai is the Burj Khalifa, which rises 828 metres (2,717 ft) and contains 160 floors. The tower has stood as both the tallest building in the world and the tallest man-made structure of any kind in the world since its completion in January 2010. The second-tallest building in Dubai is the 414-metre (1,358 ft) Princess Tower, which also stands as the world's tallest residential skyscraper. The skyscrapers of Dubai are, for the most part, clustered in three different locations. The land along Sheikh Zayed Road was the first to develop, followed by the Dubai Marina neighborhood and the Business Bay district.
Overall, Dubai has 18 completed and topped-out buildings that rise at least 300 metres (984 ft) in height, which is more than any other city in the world. Dubai has 73 completed and topped-out buildings that rise at least 200 metres (656 ft) in height, again which is more than any other city in the world. Based on the average height of the ten tallest completed buildings, Dubai has the tallest skyline in the Middle East and the world. As of 2012[update], the skyline of Dubai is ranked sixth in the world with 248 buildings rising at least 100 metres (330 ft) in height.
The history of skyscrapers in Dubai began with the construction of Dubai World Trade Centre in 1979, which is usually regarded as the first high-rise in the city. At the time of its completion, it also stood as the tallest building in the Middle East. Since 1999, and especially from 2005 onwards, Dubai has been the site of an extremely large skyscraper building boom, with all 73 of its buildings over 200 metres (656 ft) tall completed after 1999. In less than ten years, the city has amassed one of the largest skylines in the world; it is now home to the world's tallest building, the world's tallest residence, and the world's second tallest hotel. As of 2012[update], 363 new skyscrapers are under construction in Dubai; additionally, there are over 640 active high-rise developments that have been proposed for construction in the city.