Cubism is an early-20th-century avant-garde art movement pioneered by Georges Braque and Pablo Picasso, joined by Jean Metzinger, Albert Gleizes, Robert Delaunay, Henri Le Fauconnier, Fernand Léger and Juan Gris that revolutionized European painting and sculpture, and inspired related movements in music, literature and architecture. Cubism has been considered the most influential art movement of the 20th century. The term is broadly used in association with a wide variety of art produced in Paris during the 1910s and extending through the 1920s. Variants such as Futurism and Constructivism developed in other countries.