The pope who placed the crown on Charlemagne's head was which pope?

• A. Gregory I
• B. Leo III
• C. Urban II
• D. Sixtus III

Answer: (B)

Leo III’s act shows how papal authority could confer imperial legitimacy and bind church and ruler together in the medieval world. On Christmas Day in 800, in St. Peter’s Basilica, Leo III crowned Charlemagne as Emperor of the Romans, a ceremony that symbolized the pope’s power to sanction a ruler and the Carolingian alliance with the Papacy. This moment is often seen as the foundation of a revived Western empire—the Holy Roman Empire in later terms—because it publicly legitimated Charlemagne’s rule as divinely chosen and blessed by the church.

The other popes listed lived in different times and contexts, and none performed this crowning. Gregory I, known for reform and mission work in the 6th century, predates Charlemagne’s era. Urban II, who would later launch the First Crusade, reigned centuries afterward. Sixtus III ruled in the 5th to 6th centuries, long before Charlemagne.