Note 375 — Chapter XVI · THE CONFLICT OVER INVESTITURE
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The incumbent of the papal office was at the same time bishop of Rome, temporal sovereign of the papal lands, and head of the church universal. In earlier times there was always danger that the third of these functions be lost and that the papacy revert to a purely local institution, but by Gregory VII.'s day the universal headship was clearly recognized throughout the West as inherent in the office. It was only when there arose the question as to how far this headship justified the Pope in attempting to control the affairs of the world that serious disagreement manifested itself.