Francesco Cavalli was a Venetian composer, organist and singer of the early Baroque period. He succeeded his teacher Claudio Monteverdi as the dominant and leading opera composer of the mid 17th-century. A central figure of Venetian musical life, Cavalli wrote more than thirty operas, almost all of which premiered in the city's theaters. His best known works include Ormindo (1644), Giasone (1649) and La Calisto (1651).