One Wall Street (originally the Irving Trust Company Building, then the Bank of New York Building after 1988, and now known as the BNY Mellon Building since 2007), is a bank headquarters building which remains one of the finest Art-Deco-style skyscrapers in Lower Manhattan, New York City.It is 654 feet (199 m) tall and consists of two sections. The original 50-story building with a 36-story annex to the south. The facade, made of limestone, contains slight inwardly-curved bays with fluting to resemble curtains. On the lower stories are narrow windows with mullions, as well as ornate entrances. The massing of 1 Wall Street incorporates numerous small setbacks, and the top of the original building consists of a freestanding tower. The corners of the original building consist of chamfers, while the top of the tower has fluted windowless bays. The facade of the annex is designed in a style evocative of the original structure. Inside is an ornate main lobby with colored mosaics.The building replaced three previous structures, including the Manhattan Life Insurance Building, once the world's tallest building.