What were vivaldis concertos in?

Vivaldi's concertos were primarily composed for string instruments, particularly the violin, and often featured a soloist accompanied by a string orchestra and continuo. His most famous work, "The Four Seasons," is a set of violin concertos that vividly depict the changing seasons through music. Vivaldi's concertos typically followed the fast-slow-fast structure of the Baroque concerto form, showcasing both virtuosity and lyrical themes. Overall, his concertos significantly influenced the development of the genre and the Baroque style.