In Europe in the early middle ages there existed two kinds of music: that of the people, spontaneous, impulsive, the song of the Troubadour, unwritten and orally transmitted from father to son; that of the Church, which had been greatly encouraged since the days of Constantine, and especially owed much to St. Ambrose and St. Gregory. For a time music became the handmaid of the Church, but it thereby, to a certain extent, also gave voice to the lyrical feelings of the people; for the chorister and composer not only embodied popular songs into the chants, but in many instances interpolated the words themselves. This incongruity at length necessitated the reform, brought about by Palestrina--the father of sacred music as we now know it--whose _Missa Papae Marcelli_, performed in 1565, established a type which has been more or less adhered to ever since. The services of the Church gave rise to the oratorio, which, however, chiefly owes its development to Protestant genius, more especially to Handel. In 1540 San Filippo Neri formed in Milan a Society called "Le congregazione dei Padri dell' Oratorio" (from _orare_ to pray), and we are told by Crescembini that "The oratorio, a poetical composition, formerly a commixture of the dramatic and narrative styles, but now entirely a musical drama, had its origin from San Filippo Neri, who in his chapel, after sermons and other devotions, in order to allure young people to pious offices, and to detain them from earthly pleasures, had hymns, psalms, and such like prayers sung by one or more voices." "Among these spiritual songs were dialogues; and these entertainments, becoming more frequent and improving every year, were the occasion that, in the seventeenth century, oratorios were invented, so called from their origin."[A]