Who's kingdom did Charlemagne rule during the Middle Ages? What are some of his accomplishments as a leader?

Charlemagne was the king of the Franks, a Germanic tribe that lived in what today are the countries of France, Belgium and parts of Germany. He was also crowned as the Holy Emperor of Rome. During his rule, he promoted a number of economic and social reforms including the promotion of education and the enforcement of laws on lending and prices. He also defended Christianity in Western Europe and pemited a cultural revival there (the Carolingian Renassaince).