Charles the Great, also known as Charlemagne, was a medieval ruler who became King of the Franks in 768 and later crowned Emperor of the Romans in 800. He is known for uniting much of Western Europe during the early Middle Ages, laying the foundations for modern France and Germany. His reign marked a significant period of cultural and political revival, often referred to as the Carolingian Renaissance. Charlemagne implemented various reforms, including the promotion of education and the establishment of a more organized government. He encouraged the spread of Christianity and worked closely with the Catholic Church, which helped strengthen his authority. His legacy continues to influence European history and culture.