Different religions have a deep-rooted history. These beliefs define how they used to operate in the past and how some of those cultures are exercised in the modern day generation.
Below is an excerpt example of a medieval religious type of composition known as a Gregorian Chant. Monks sang it during Catholic Mass. It was developed in Central and Western Europe during the 9th and 10th centuries where people wrote new songs and replaced them with the old ones. Most people believe it was written by Pope Gregory the Great. Others believe that kings such as Charlemagne brought music from Germany and Rome. People from Charlemagne changed the songs to become Gregorian Chant.
People sing the Gregorian Chant in two parts of the Roman Rite. The Office, part of the Roman Rite where men and women pray at different times of the day. And The Mass which Catholics believe to receive the body and blood of Christ. Even though the Roman Catholic Church does not require people to sing Gregorian Chants still, it believes that is is the best form of prayer through music.
People think that the liturgy of the Roman Mass was established during the 7th Century. Pope Hadrian I, sent Charlemagne courts Roman Chants which were later converted into the system of eight modes. These eight modes together with some new songs added became the Gregorian Chant.