As it is known according to his Great Capitulary, Charlemagne, in his time, played a large role in legislating religious functions under his rule: much of the legislation under his Capitulary dealt with the performance of monastic staff, clergymen and such. Due to his previous role as emperor and the authority over the Church that came in suit, it’s conceivable that Charlemagne would find at least slight discomfort in seeing the Papacy have such all-encompassing power. For this reason, I believe it’s likely that Charlemagne would have sided with Henry
As it is known according to his Great Capitulary, Charlemagne, in his time, played a large role in legislating religious functions under his rule: much of the legislation under his Capitulary dealt with the performance of monastic staff, clergymen and such. Due to his previous role as emperor and the authority over the Church that came in suit, it’s conceivable that Charlemagne would find at least slight discomfort in seeing the Papacy have such all-encompassing power. For this reason, I believe it’s likely that Charlemagne would have sided with Henry