Henri Matisse was a famous French artist known for his use of bold color and fluid drawings. He helped define revolutionary developments in modern art in the early 20th century along with Picasso and Duchamp. Matisse originally studied law but became interested in art, studying at the Académie Julian in Paris. His style was called Fauvism, prioritizing color over realistic forms. He influenced many later artists like David Hockney and pioneered innovative works utilizing expressive color.