Art Moderne architecture (fl. 1930-1945), alternatively known as Streamline Moderne, is the less ornamented, more streamlined version of Art Deco architecture. As opposed to the verticality and boxiness of Art Deco, Art Moderne buildings are more horizontal and have curving, smooth forms. It was popular from the late 1930s until the beginning of World War II.
Art Moderne's cleaner nature is likely related to the onset of the Great Depression, as new buildings omitted unnecessary ornamentation to reduce costs. In addition, modern methods of transportation known as "streamliners," such as trains and automobiles, were being designed with swoopy and streamlined appearances. The result was a method of design focused on a sense of motion through form. A significant event in its development was the 1933 Chicago World's Fair, which had Art Deco and early Art Moderne fair buildings.
Unlike the grand programs of orthodox Art Deco architecture, such as skyscrapers and civic buildings, Art Moderne buildings tend to be smaller and transportation-related. Common examples include bus stations, airport terminals, and theaters. Buildings are often white or have subtle pastel colors, often green, blue, and pink. Corners are usually rounded. Windows round these corners and are glass block or porthole-shaped. Massing is often simpler, but higher-profile buildings may have features such as towers may also be present. Art Moderne architecture is uncommon due to its brief era of popularity.
Art Moderne architecture declined with the beginning of World War II, as domestic construction basically ground to a halt. It was succeeded by Modern and International architecture.