Italian early Baroque composer Giacomo Carissimi (1604/5-1674) was an ordained priest. He was choirmaster at Assisi and later was appointed to a like position at the church of St. Apollinaris in Rome. He spent much of his life as director of music at the Jesuit's German College in Rome. He advanced the development of the oratorio before the form reached its peak under Händel and Bach. Carissimi's output was almost exclusively religious. He also trained a number of other composers, among them Charpentier.