Foster's Hearst Tower opened officially on 9 October with a gala celebration. The 46-storey glass-and-steel world headquarters tower rising 597 feet from within its landmark six-story base on Eighth Avenue now houses 2,000 New York City-based Hearst employees. The tower rises dramatically above Joseph Urban’s existing six-storey Art Deco building. Designed to consume significantly less energy, Hearst Tower is utilising outside air ventilation for up to 75% of the year and is a model of sustainable office design. The tower has a triangulated form with its corners peeled back, the effect emphasises the building's vertical proportions and creates a distinctive facetted silhouette on the skyline that reveals unique views across the Manhattan grid. Establishing a creative dialogue between old and new, the tower is linked to the existing building by a transparent skirt of glass which floods the spaces below with natural light, giving the impression of a glass tower floating weightlessly above.