After the 6th century, Western European civilization entered a new historical stage, and a new feudal economic form with serfdom as the core gradually took shape-the Middle Ages. Its political focus shifted from the Mediterranean region centered on Italy to the inland region centered on Frank. Its ruling nation changed from Roman Latin nation to Germanic nation; The main body of its spiritual culture changed from secular Roman culture to religious Christian culture. Due to the rise of Germanic kingdoms, Franks, Caroline Empire, France, Germany, England and other countries, culture is also developing in a multi-track and diversified trend. This era is both a "dark age of ignorance" and a "rosy ideal age", full of hunger, hardship, violence and inequality, full of vitality and creativity. It is in all kinds of hardships and opportunities caused by this era that the western European civilization originated in the classical era has been expanded and updated again.