Antonio Vivaldi was an Italian composer and violinist of the Baroque period. He is best known for his concertos, particularly his set of violin concertos known as 'The Four Seasons.' Vivaldi's music is characterized by its virtuosity, rhythmic energy, and vivid musical imagery. In addition to his concertos, Vivaldi composed operas, sacred choral music, and chamber music. His most famous works include his 'Gloria,' his opera 'The Four Seasons,' and his 'Concerto for Two Trumpets.'