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Based on all three of the primary standards used to evaluate such structures, the Burj Khalifa, a mixed-use skyscraper located in Dubai, United Arab Emirates, is the tallest structure in the world (see to Researcher's Note: Heights of Buildings). Originally dubbed Burj Dubai while under construction, Burj Khalifa (also known as "Khalifa Tower") was formally named in honor of Sheikh Khalifa ibn Zayed Al Nahyan, the ruler of the neighboring emirate of Abu Dhabi. The interior of the tower was not finished when it was officially launched on January 4, 2010. Constructed to accommodate an assortment of business, residential, and hospitality endeavors, the tower—whose precise height remained a tightly kept secret during its building—was completed at 163 stories and 2,717 feet (828 meters) in the air. It was created by