Burj Khalifa rises gracefully from the desert & honors Dubai with its extraordinary union of art, engineering & meticulous craftsmanship. At 828 meters (2, 716.5 ft.), the equivalent of a 200-story building, Burj Khalifa has 160 habitable levels, the most of any building in the world. In 2003, as a result of an international design competition, Skidmore, Owings & Merrill LLP (SOM) was selected from a group of five international competitors to carry out the architecture & engineering of the Burj Khalifa.SOM incorporated patterns & elements from traditional Islamic architecture, but the most inspiring muse was a regional desert flower, the Hymenocallis, whose harmonious structure is one of the organizing principles of the towers design. Three petals are arranged in a triangular shape & unified at the center, & instead of repeated identical patterns, the architectural plan appoints successively receding & rotated stories. To support the unprecedented height of the building, the engineers developed a new structural system called the buttressed core, which consists of a hexagonal core reinforced by three buttresses that form the Y shape.