Why did Charlemagne object to being crowned by the Pope?

Charlemagne initially objected to being crowned by the Pope because he believed that the authority of the emperor should not be derived from the Church, but rather stem from his own power and legitimacy as a ruler. He wanted to maintain a clear distinction between secular and ecclesiastical authority, asserting that his position was divinely ordained. Additionally, he may have viewed the Pope's action as an assertion of papal power over the empire, which could undermine his sovereignty. Ultimately, his concerns reflected a desire for independence and control over his own reign.