Charlemagne
Latin: Carolus Magnus, meaning Charles the Great; numbered Charles I of France and the Holy Roman Empire) (742/747 – 28 January 814) was King of the Franks from 768 to his death. He expanded the Frankish kingdoms into a Frankish Empire that incorporated much of Western and Central Europe. During his reign, he conquered Italy and was crowned Imperator Augustus by Pope Leo III on 25 December 800 as a rival of the Byzantine Emperor in Constantinople. His rule is also associated with the Carolingian Renaissance, a revival of art, religion, and culture through the medium of the Catholic Church. Through his foreign conquests and internal reforms, Charlemagne helped define both Western Europe and the Middle Ages.