What was a significant outcome of Charlemagne's coronation in 800 AD?

The coronation of Charlemagne in 800 AD by Pope Leo III had a profound significance for the relationship between the church and the state, particularly in the context of the Western papacy. This event symbolized the fusion of Christian and Roman authority, with Charlemagne being crowned as the Emperor of the Romans. It marked a pivotal moment in the history of the papacy, as it affirmed the pope's influence over the secular rulers of the time, effectively strengthening the position of the Western papacy in relation to political powers.

This act established a precedent for the church's involvement in imperial authority, reinforcing the idea that the pope had the divine right to confer legitimacy on kings and emperors. As a result, it laid the groundwork for future interactions between church and state, ultimately shaping the political landscape of medieval Europe. The idea of a Christian empire under Charlemagne also helped to unify diverse territories and peoples under a common faith and governance, elevating the standing of the papacy and its role in European politics.