Foster & Partners has announced the completion of the practice’s Comcast Technology Center in Philadelphia, which is the city’s tallest building.

The 341-metre stepped tower includes innovative workspace for the telecoms giant as well as active public spaces, television studios and a 12-storey Four Seasons Hotel at its top. Digital artwork by legendary music producer and artist Brian Eno is a feature of each room.

Fosters said the development, which was six years in the making, had a central spine articulated at the top as an illuminated blade of glass. Its facades feature panoramic glass elevators and a series of three-storey sky gardens.

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