Foster + Partners' Comcast Technology Center skyscraper in Philadelphia contains "Silicon Valley-style" work spaces topped with a 12-storey Four Seasons hotel.
The British firm's 341-metres-tall skyscraper at 1800 Arch Street is built next to the Comcast Center, which was completed in 2008, to create a campus for cable company Comcast.
Photograph by Jeffrey Totaro
The Comcast Technology Center comprises three stepped glass structures with a central glass spine that is flanked by glass elevators on either side. The spire rises well above the neighbouring 297-metre-high  Comcast Center to give the new tower the title of the city's tallest building.
Inside, the high-rises has a diverse mix of functions including open and airy work spaces and television studios for NBC10 and Telemundo62; shops, bars and restaurants that are open to the public; site-specific artwork; and the Four Seasons Philadelphia.
"The Comcast Technology Center brings together an unusual mixture of uses to create a new exemplar for the design of tall buildings," said Norman Foster.  "It makes a positive contribution to the surrounding urban fabric, drawing public life into the building and responding to the lively street culture of Philadelphia."
"It features Silicon Valley-style loft spaces that encourage technological innovation and collaborative ways of working, while integrating works of art with public spaces and the building fabric," he added.

At the bas...