A key figure of Futurism, he was in Rome from about 1900, where he studied under Balla and met Severini. In Milan from 1907, he met F.T. Marinetti, Carrà and Russolo and made a fundamental contribution to the Technical Manifesto of Futurist Painting (1910) and to the Technical Manifesto of Futurist Sculpture (1912). In 1911 and 1912, he came into contact with Cubism in Paris. Dynamism, simultaneity, the interpenetration of planes and forms, and a combination of vision and memory brought fluidity and power to his painting (The City Rises, Simultaneous Visions, The Farewells) and his sculpture (Unique Forms of Continuity in Space, 1913).