Gregorian Chant

Gregorian Chant is the music of the Mass of the Ages.  A form of auditory incense, the tradition of chanting scripture predates the birth of Christ by about 1,000 years, to the time of King David, who wrote the psalms specifically for the purpose of divine worship:

Psalm 7:1 The psalm of David which he sung to the Lord for the words of Chusi the son of Jemini.

By the time Pope St. Gregory the Great (590-604) collected and codified the music into the Antiphonarium and Graduale Romanum, this form of ancient prayer had been in use within the Mass since the time of the early Christian church.