The Petronas Towers form the centerpiece of Kuala Lumpur's commercial district. The design responds to its climate and to formal characteristics of the dominant Islamic culture. The towers are figurative and symmetrical and create a figurative space between them. Each tower has its own vertical axis, but the axis of the total composition is in the center of the void. Built of steel-reinforced concrete columns clad in stainless steel and glass, with a design based on geometric patterns originating in ancient Islam, the 88-storey buildings are connected at levels 41 and 42 by a double-decker pedestrian skybridge, and each tower is surmounted by a 242-ft-high pinnacle.