This 813-foot-tall structure is among the largest and most important 20th century skyscrapers in New York City. It was primarily planned by Chase Manhattan Bank executive vice president David Rockefeller, the youngest son of John D. Rockefeller, Jr. and Abby Aldrich Rockefeller. It was planned following the 1955 merger of Chase National Bank and the Bank of the Manhattan Company to consolidate 8,700 employees. The architects designed the elegant slab-like tower in the International style, cladding the gridded façade with natural color and black porcelain-enameled aluminum panels, as well as H-section mullions and clear glass.