Others see the first specimens of opera in the Greek plays; but the earliest musical dramas of modern Italy, from which the Opera of the present day is descended directly, and in an unbroken line, are "mysteries" differing only from the dramatic mysteries in so far that the dialogue in them was sung instead of being spoken. "The Conversion of St. Paul" was played in music, at Rome, in 1440. The first profane subject treated operatically, was the descent of Orpheus into hell; the music of this Orfeo, which was produced also at Rome, in 1480, was by Angelo Poliziano, the libretto by Cardinal Riario, nephew of Sixtus IV. The popes kept up an excellent theatre, and Clement IX. was himself the author of seven libretti.
Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.