The Chrysler Building is considered a leading example of Art Deco architecture. The corners of the 61st floor are graced with eagles; on the 31st floor, the corner ornamentation are replicas of the 1929 Chrysler radiator caps. The building is constructed of masonry, with a steel frame, and metal cladding. In total, the building currently contains 3,862 windows on its facade and 4 banks of 8 elevators designed by the Otis Elevator Corporation.The building was declared a National Historic Landmark in 1976.