Who united Western Europe with Rome and is called the father of Europe?

Charlemagne, also known as Charles the Great, is often referred to as the "father of Europe" for his role in uniting much of Western Europe under his rule in the early Middle Ages. Crowned Emperor of the Romans in 800 AD by Pope Leo III, he expanded the Frankish state and facilitated the Carolingian Renaissance, which promoted education and culture. His reign laid the foundation for the future political landscape of Europe and the idea of a unified European identity.