in a new style, called "Streamline Moderne" or sometimes just Streamline. This style, sometimes modeled after for the form of ocean liners, featured rounded corners, strong horizontal lines, and often nautical features, such as superstructures and steel railings. It was associated with modernity and especially with transportation; the style was often used for new airport terminals, train and bus stations, and for gas stations and diners built along the growing American highway system. In the 1930s the style was used not only in buildings, but in railroad locomotives, and even refrigerators and vacuum cleaners. It both borrowed from industrial design and influenced it. In the United States, the Great Depression led to a new style for government buildings, sometimes called PWA Moderne, for the Public Works Administration, which launched gigantic construction programs in the U.S. to stimulate employment. It was essentially classical architecture stripped of ornament, and was employed in state and federal buildings, from post offices to the largest office building in the world at that time, Pentagon (1941–43), begun just before the United States entered the Second World War. American modernism (1919–1939) During the 1920s and 1930s, Frank Lloyd Wright resolutely refused to associate himself with any architectural movements. He considered his architecture to be entirely unique and his own. Between 1916 and 1922, he broke away from his earlier prairie house style and worked instead on houses decorated with textured blocks of cement; this became known as his "Mayan style", after the pyramids of the ancient Mayan civilization. He experimented for a time with modular mass-produced housing. He identified his architecture as "Usonian", a combination of USA, "utopian" and "organic social order". His business was severely affected by the beginning of the Great Depression that began in 1929; he had fewer wealthy clients who wanted to experiment. Between 1928 and 1935, he built only two buildings: a hotel near Chandler, Arizona, and the most famous of all his residences, Fallingwater (1934–37), a vacation house in Pennsylvania for Edgar J. Kaufman. Fallingwater is a remarkable structure of concrete slabs suspended over a waterfall, perfectly uniting architecture and nature. The Austrian architect Rudolph Schindler designed what could be called the first house in the modern style in 1922, the Schindler house. Schindler also contributed to American modernism with his design for the Lovell Beach House in Newport Beach. The Austrian architect Richard Neutra moved to the United States in