Chivalry and Chivalry in Western Europe in the Middle Ages: In 800 AD, Charlemagne of the Frankish Kingdom unified Western Europe and was crowned "the Great Roman Emperor" by the Pope. Of course, 12 warriors who fought side by side with Charlemagne in the south and north became "guardians of God". They were called "paladins", that is, paladins, and were regarded as the origin of chivalry. The complete knight system was not formed until 1 1 century. Strictly speaking, knight means a class. At first, knights were soldiers belonging to the nobility, and they were obliged to fight for the kingdom (serving the kingdom or lords for about 40 days every year). As a reward, they collect agricultural rents from some agricultural land under their jurisdiction. In this way, a contractual employment relationship was formed between the nobles and knights in the kingdom. In the early days, all soldiers could become knights, but later, knights with landlord status gradually formed a fixed class, and they have become vassals of nobles and rulers. The Crusades launched by Roman Catholicism and rulers pushed the knight class to an extremely prosperous historical period. The bravery of the knight began to combine with the sacred belief of Christianity, and the knight also had a new identity: the guardian of Christ. Knights in the glory of God have finally become deeply admired and respected figures. They are loyal to the rulers and Christ, and inspired by Christian teachings, they are willing to help widows and children. In this way, "knights are separated from their barbarian and pagan backgrounds and integrated into the social structure of Christian culture." Therefore, knights, like priests and farmers, are regarded as one of the three indispensable organs of society. " From the chivalrous literature prevailing in the Middle Ages, we can also be pleasantly surprised to find the romantic side of knights: they are decent in words and deeds, elegant in manners, pursuing romantic love, and have a unique view of love-love is a pure spiritual feeling, and sensuality is an evil blasphemy component. This undoubtedly increased their sacredness.