Charlemagne Crowned by Pope Leo III
On Christmas Day in 800, Pope Leo III placed a crown on Charlemagne's head in Old St. Peter's Basilica in Rome and declared him Emperor of the Romans. It was the first Western imperial coronation since the deposition of Romulus Augustulus in 476. Charlemagne already ruled most of Western Europe through military conquest, but the ceremony fused Frankish kingship with papal sanction. For the next 700 years, European monarchs sought coronation by the Church to legitimize their rule, and the Pope retained the implicit power to excommunicate kings who defied him.
Charlemagne reportedly disliked the arrangement — it implied the Pope could grant, and therefore withdraw, imperial authority. That tension between sacred and temporal power defined European politics for a millennium.
01 · Divine Authority
For most of human history, the explanation for power was that the powerful were chosen, descended from, or personally in contact with the gods. Pharaohs were gods. Roman emperors were deified. Chinese emperors ruled by the Mandate of Heaven. The Pope could unmake a king.
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