run by Le Corbusier, were built in an austere style with plain white walls and no decoration; they were among the earliest examples of modernist architecture. Skyscrapers American skyscrapers marked the summit of the Art Deco style; they became the tallest and most recognizable modern buildings in the world. They were designed to show the prestige of their builders through their height, their shape, their color, and their dramatic illumination at night. The American Radiator Building by Raymond Hood (1924) combined Gothic and Deco modern elements in the design of the building. Black brick on the frontage of the building (symbolizing coal) was selected to give an idea of solidity and to give the building a solid mass. Other parts of the façade were covered in gold bricks (symbolizing fire), and the entry was decorated with marble and black mirrors. Another early Art Deco skyscraper was Detroit's Guardian Building, which opened in 1929. Designed by modernist Wirt C. Rowland, the building was the first to employ stainless steel as a decorative element, and the extensive use of colored designs in place of traditional ornaments. New York City's skyline was radically changed by the Chrysler Building in Manhattan (completed in 1930), designed by William Van Alen. It was a giant seventy-seven-floor tall advertisement for Chrysler automobiles. The top was crowned by a stainless steel spire, and was ornamented by deco "gargoyles" in the form of stainless steel radiator cap decorations. The base of the tower, thirty-three stories above the street, was decorated with colorful art deco friezes, and the lobby was decorated with art deco symbols and images expressing modernity. The Chrysler Building was soon surpassed in height by the Empire State Building by William F. Lamb (1931), in a slightly less lavish Deco style and the RCA Building (now 30 Rockefeller Plaza) by Raymond Hood (1933) which together completely changed New York City's skyline. The tops of the buildings were decorated with Art Deco crowns and spires covered with stainless steel, and, in the case of the Chrysler building, with Art Deco gargoyles modeled after radiator ornaments, while the entrances and lobbies were lavishly decorated with Art Deco sculpture, ceramics, and design. Similar buildings, though not quite as tall, soon appeared in Chicago and other large American cities. Rockefeller Center added a new design element: several tall buildings grouped around an open plaza, with a fountain in the middle. Late