The Empire State Building Style is a combination of two architectural styles: Deco and Art Deco. Deco, also known as Art Deco, is an eclectic style of architecture that emerged in the 1920s and 1930s. It combines traditional craft motifs with Machine Age imagery and materials. Art Deco is a more modernized version of Deco, which emerged in the 1930s and 1940s. It is characterized by its use of bold geometric shapes, bright colors, and lavish ornamentation. Both styles were used in the design of the Empire State Building, which was completed in 1931.