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Charlemagne or Charles the Great was King of the Franks from 768, King of the Lombards from 774, and Emperor of the Romans from 800. During the Early Middle Ages, Charlemagne united the majority of western and central Europe. He was the first recognized emperor to rule from western Europe since the fall of the Western Roman Empire around three centuries earlier.[4] The expanded Frankish state that Charlemagne founded is known as the Carolingian Empire. He was later canonized by Antipope Paschal III.
Charlemagne was the eldest son of Pepin the Short and Bertrada of Laon, born before their canonical marriage. He became king of the Franks in 768 following his father's death, initially as co-ruler with his brother Carloman I, until the latter's death in 771. As sole ruler, he continued his father's policy towards the papacy and became its protector, removing the Lombards from power in northern Italy and leading an incursion into Muslim Spain. He campaigned against the Saxons to his east, Christianizing them upon penalty of death and leading to events such as the Massacre of Verden. He reached the height of his power in 800 when he was crowned "Emperor of the Romans" by Pope Leo III on Christmas Day at Old St. Peter's Basilica in Rome.