“Frank Gehry, admired for his voluptuous buildings of undulating titanium and steel, is to be the architect of a new performing arts center at ground zero, his first major cultural project in Manhattan, the development corporation in charge of rebuilding the site said yesterday. The selection of Mr. Gehry for the arts center – which is to include the Joyce Theater and the Signature Theater – brings to Lower Manhattan a celebrity architect who has been notably absent from perhaps the most closely watched architectural site in the world.”