Charlemagne (pronounced /ˈʃɑrlɨmeɪn/; Latin: Carolus Magnus or Karolus Magnus, meaning Charles the Great; 2 April 742 – 28 January 814) was King of the Franks from 768 and Emperor of the Romans (Imperator Romanorum) from 800 to his death. He expanded the Frankish kingdom 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 which temporarily made him 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. He is numbered as Charles I in the regnal lists of France, Germany (where he is known as Karl der Große), and the Holy Roman Empire