Vivaldi was a prominent composer in late Baroque Italy who wrote over 500 concertos, most notably The Four Seasons. He helped popularize the solo concerto form which alternated between a solo instrument accompanied by orchestra and full orchestra sections. In France during this period, Couperin wrote keyboard suites comprised of dances and character pieces that featured ornamentation. Rameau was an influential opera composer and theorist who incorporated Italian styles like da capo arias into French opera, while still retaining French elements like overtures and recits with shifting meter.