Architect Foster and Partners has been appointed to design a 65-storey tower on the World Trade Centre site.

Lord Foster will design Tower Two at 200 Greenwich Street for developer Larry Silverstein. Silverstein is already constructing two towers on the site.

Announcing the appointment, Silverstein said he was confident Foster would deliver a “remarkable jewel” on the Manhattan skyline.

He said: “As he has proven time and again, Norman Foster understands how to design a bold urban icon while simultaneously enhancing the environment and quality of life of the building’s occupants.”

Design work on the tower, which will provide retail and office space, is scheduled for completion in 2007. The building is due to open in 2011.

Construction is already under way on the first tower on the site, 7 World Trade Centre, designed by David Childs of Skidmore, Owings & Merrill. Work on the remaining signature projects, including Childs’ and Daniel Libeskind’s Freedom Tower and the memorial Reflecting Absence will begin this spring.

Foster said the Greenwich Street project would play a key role in the regeneration of downtown Manhattan. He said: “It is an honour and a tremendous responsibility to play a role in hastening the rebirth of the World Trade Centre.”