The 1920s art style known as 'Deco' was a popular movement that emerged in the early 20th century. It was characterized by its use of bold geometric shapes, bright colors, and modern materials such as chrome and glass. Deco was heavily influenced by the Art Deco movement, which was a combination of traditional craftsmanship and modern industrial techniques. The style was used in architecture, interior design, fashion, and other forms of visual art.