Giovanni Francesco Anerio (7 July 1569 - 11 June 1630) was an Italian composer of the Roman School, of the very late Renaissance and early Baroque eras. He was the younger brother of Felice Anerio. Giovanni's principal importance in music history was his contribution to the early development of the oratorio; he represented the progressive trend within the otherwise conservative Roman School, though he also shared some of the stylistic tendencies of his brother, who was much indebted to Palestrina.