Diego Rivera was a Mexican muralist and painter who was active in the early 20th century. He is best known for his large-scale murals that depicted Mexican culture and society. His works are often characterized by their bold colors and social commentary. Rivera was a major figure in the Mexican Mural Movement, which sought to use art to promote social change. He was also a member of the Mexican Communist Party. Rivera's works can be found in many public spaces around the world, including the United Nations headquarters in New York City.