I think the island of Great Britain has the strongest musical culture. Britain and Ireland have historically had Celts, Jutes, Angles, Saxons and Normans living there, and they have been constantly changing. The blood was mixed and they finally settled here. In the Middle Ages, this area was under three different dynasties; for a time, certain lands in northern France belonged to England. As for the relationship between Britain and Ireland, there were still many subtle changes until Ireland became independent. Therefore, the generalization of British musical culture is more complicated and can usually be traced back to the Celtic bardic music before the feudal system began to form in the 7th century. Later, Celts, Anglos, and Saxons introduced Roman Catholic Gregorian chant tunes to Britain. Like many countries in Europe, at the beginning of the Middle Ages, early polyphonic music was formed based on Gregorian chant, such as Organon, Gimmel and Faubourdon music styles. In 1226, John of Fornset, a monk from Reading Church, composed the simple and pure secular six-part canon "Summer Comes", which is the most outstanding representative work in early European polyphonic music literature. In addition to professional music activities, British folk music also has a great influence on the world. The folk songs, dances, music and military music of Scotland and Ireland are loved by people around the world. Many of the British folk songs are written in a pentatonic scale with little or no semitone progression, which is very distinctive. Its light and sad mood gives people a deep feeling. Britain also has a unique religious hymn called "Anselm", folk music that combines Anglo and Saxon customs with Christian characteristics, and a lot of music related to Christian festivals, especially the "Carol's" Christmas carols and the Morris dance used to dance around the flower pole during the holidays are all representative.