Charlemagne, the Frankish king who ruled from 768 to 814 AD, transformed Western Europe through military conquests and cultural reforms. He expanded the Frankish kingdom into a vast empire, earning the title "Emperor of the Romans" and shaping the political landscape of medieval Europe. The Carolingian dynasty, named after Charlemagne's grandfather Charles Martel, rose to power in the 8th century. Under Charlemagne's rule, the dynasty reached its peak, establishing a vast empire and ushering in the Carolingian Renaissance, a period of cultural and intellectual revival.