The Petronas Towers (also known as the Petronas Twin Towers) are a pair of skyscraper office buildings in Kuala Lumpur, Malaysia, that are among the world’s tallest buildings. The Twin Towers, built to house the headquarters of Petronas, the national petroleum company of Malaysia, were designed by the Argentine-born American architect Cesar Pelli; they were completed in 1998. The plan for each tower is identical: an eight-lobed circular structure that contains 88 stories of occupiable space and a pyramid-shaped pinnacle surmounted by a slender steel spire. Both rise to a height of 452 metres (1.483 feet), which includes 74 metres (242 feet) for pinnacle and spire. Each building is supported by 16 large columns around its perimeter, which, along with the rest of the frame, are made of high-strength, steel-reinforced concrete rather than of structural steel; the exterior sheathing consists of stainless steel and glass. A skybridge two stories tall links the two towers between the 41st and 42nd stories.