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The Diploma Ottonianum (also called the Pactum Ottonianum, Privilegium Ottonianum or simply Ottonianum) was an 962 agreement between Pope John XII and Otto I, King of Germany and Italy.[1] It confirmed the earlier Donation of Pepin, granting control of the Papal States to the Popes, regularizing Papal elections, and clarifying the relationship between the Popes and the Holy Roman Emperors.
- ^ Ullmann, Walter (1953). "The Origins of the Ottonianum". The Cambridge Historical Journal. 11 (1): 114–128. ISSN 1474-6913.