Help on Humanities paper (Gregorian chant)

I need help on Humanities paper. I am not sure I didn't make any mistake. thank you
The original Gregorian chant creator is Charlemagne (742-814) who is emperor of the Roman Empire in Saint Peter's Basilica. He was an essentially contributed person an art, education and music. He brought monks from Rome to stabilize and reform church music. This authority may tell how much he liked the church music. Roman music represented one tradition- later called Gregorian chant.

Gregorian chant was monophonic which is, one or many voices sang a single melodic line. While I was listening the snippets of Gregorian chant, I realized that they had not used any instrumental at that time. But sounds like amazing. Moreover, it's relaxing, no worries, and tranquility. The chant sung by men and women who got extremely strong voice. Another word is song created in capella.

In modern time, doctors may suggest to listen this music for who meditate. I could tell that song for relaxation, meditation, stress reduction, pain relief or tapping into one's soul. The song puts the people in a place where they feel very presence of God. I'm truly enjoyed.