Answer:
It established the Church as a political force.
Explanation:
The crowning of Charlemagne by Pope Leo III gave a lot of political power to the Catholic Church.
It established the Pope as the legitimate authority who would crown the Holy Roman Emperors. The Pope also obtained a geographical region under his direct control: the Papal States, which were given by Charlemagne to the Pope in exchange for his crowning.
Bolesław The First, aka Bolesław The Great.
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