The term ART (ARCHITECTURE TYPE) can be summarized by the crossword solution DECO, which is a four letter word. DECO is short for ART Deco, a popular style of ARCHITECTURE and design that originated in France in the 1920s and 1930s. It is characterized by its use of geometric shapes, bold colors, and modern materials such as stainless steel and chrome. ART Deco was popularized in the United States during the Great Depression and has since become a popular style of ARCHITECTURE around the world.