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How did Otto I’s rule shape the relationship between the Holy Roman emperors and the papacy?

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Stone sculptures of Otto I and his wife Edith, both crowned and seated, displayed side by side in the cathedral at Magdeburg, Germany. — Otto I Otto I and his wife Edith, sculptures in the cathedral at Magdeburg, Germany.

Otto I’s rule established a relationship characterized by the close subordination of the papacy to the imperial office, setting a precedent where the emperor acted as the protector and supreme overseer of the church.1

Following his coronation as emperor in 962, Otto I and Pope John XII concluded the Privilegium Ottonianum, a treaty intended to regulate their relationship. While this agreement confirmed the papacy's temporal power, it also asserted imperial authority over the church. Otto demonstrated this power by deposing Pope John XII for political betrayal and installing his own candidates, such as Leo VIII, to the papacy.21

This dynamic defined the imperial role for nearly a century. The emperor was viewed as God’s vicar on earth and the effective head of Latin Christendom, responsible for the welfare of the church. Consequently, the papacy often functioned under imperial protection, and emperors frequently intervened to depose or appoint popes to ensure stability. This period established the empire as the dominant force in the relationship, with the papacy largely subordinate to the emperor's duty to safeguard the church's interests.1