Background: The emergence of Christianity as a unifying force and the decline of the Western Roman Empire for more than 1,000 years.

Node: In the early days of the church, the Christian leadership community still belonged to Judaism - about 170 years ago Christianity called itself Eastern The church is also a universal church - In 313, the emperor of the Roman Empire issued the Edict of Milan, recognizing Christianity as having full equal status - In 380, Christianity became the state religion of the Roman Empire - In 395, the Roman Empire was divided into two empires, the East and West - In 476, the Western Roman Empire was destroyed , the Eastern Roman Empire was destroyed by the Ottoman Turks in 1453. In 1054, Christianity was divided into Eastern political religion and Catholicism. In the first half of the 16th century, Martin Luther triggered the religious reform, which led to separation from Catholicism and the establishment of various protestants? There are three pillars of politics.

Proposed by medieval middle ages humanists and other scholars

Time: between the 5th century AD and the 14th and 15th centuries AD

Why is the dark age said: full of ignorance Darkness, theocracy dominates everything, and human nature is suppressed. The purpose of the Renaissance is to resurrect ancient civilization and get rid of darkness. This is the view of the Renaissance. This is the historical prejudice that affects later generations' views of the Middle Ages. Scholars in the 20th century vindicated it. Proof, American musicologist Jeremy Yudkin's "European Medieval Music"

Medieval music mainly served church liturgy? The development of modal notation, rhythm and polyphony? The emergence of rational music, Because of the praise of God, the content reaches a metaphysical dimension

Period: Gregorian chant from the 5th to the 10th century AD? The development of polyphony from the 11th to the 13th century (prosperity)? The Art Nouveau literature and art from the 14th to the 15th century The germ of reviving humanism