The origins of the oratorio can be found in sacred dialogues in Italy. These were settings of Biblical, Latin texts and musically were quite similar to motets. There was a strong narrative, dramatic emphasis and there were conversational exchanges between characters in the work. Giovanni Francesco Anerio's "Teatro harmonico spirituale" (1619) is a set of 14 dialogues, the longest of which is 20 minutes long and covers the conversion of St. Paul and is for four soloists: Historicus (narrator), tenor; St. Paul, tenor; Voice from Heaven, bass; and Ananias, tenor. There is also a four-part chorus to represent any crowds in the drama. The music is often contrapuntal and madrigal-like.