Cesar Pelli describes the process of designing the Petronas Twin Towers in Malaysia. The Petronas Towers, the central element of the Kuala Lumpur City Centre development, are a modern expression of Malaysia’s culture, history, and climate, and symbols of its economic growth and hopes for the future. The twin towers rise from a mixed-use base of cultural, commercial, and public spaces set in a large park in the center of the city. Until 2004, they were the world’s tallest buildings.