|Bishop of Rome|
|Papacy began||27 December 795|
|Papacy ended||12 June 816|
|Created cardinal||by Adrian I|
Rome, Exarchate of Ravenna, Eastern Roman Empire
|Died||12 June 816 (aged 66)|
Rome, Papal States
|Previous post||Cardinal-Priest of Santa Susanna|
|Feast day||12 June|
|Other popes named Leo|
Pope Leo III (Latin: Leo; fl. 12 June 816) was the bishop of Rome and ruler of the Papal States from 26 December 795 to his death. Protected by Charlemagne from the supporters of his predecessor, Adrian I, Leo subsequently strengthened Charlemagne's position by crowning him emperor. The coronation was not approved in Constantinople, although the Byzantines, occupied with their own defenses, were in no position to offer much opposition.
Leo was of a modest family in southern Italy, the son of Atyuppius and Elizabeth. He was made cardinal-priest of Santa Susanna by Pope Adrian I, and seemingly also vestiarius, or chief of the pontifical treasury, or wardrobe.
He was elected on 26 December 795, the day Adrian I was buried, and consecrated on the following day. It is quite possible that this haste may have been due to a desire on the part of the Romans to prevent any interference by the Franks. With the letter informing the Frankish ruler Charlemagne that he had been unanimously elected pope, Leo sent him the keys of the confession of St. Peter, and the standard of the city, and requested an envoy. This he did to show that he regarded the Frankish king as the protector of the Holy See. In return, Charlemagne sent letters of congratulation and a great part of the treasure which the king had captured from the Avars.
Charlemagne's gift enabled Leo to be a great benefactor to the churches and charitable institutions of Rome. While Charlemagne's letter is respectful and even affectionate, it also exhibits his concept of the coordination of the spiritual and temporal powers, and he does not hesitate to remind the pope of his grave spiritual obligations. He further stated that it was his role to defend the Church, and the role of the pope to pray for the realm and for the victory of his army.
Prompted by jealousy or ambition, or the thought that only someone of the nobility should hold the office of pope, a number of relatives of Adrian I formed a plot to render Leo unfit to hold his office. On the occasion of the procession of the Greater Litanies, 25 April 799, when the pope was making his way towards the Flaminian Gate, he was suddenly attacked by armed men. He was dashed to the ground, and an effort was made to root out his tongue and tear out his eyes which left him injured and unconscious. He was rescued by two of Charlemagne's missi dominici, who came with a considerable force. Duke Winiges of Spoleto sheltered the fugitive pope, who went later to Paderborn, where Charlemagne's camp then was. He was received by the Frankish king with the greatest honour at Paderborn. This meeting forms the basis of the epic poem Karolus Magnus et Leo Papa.
Leo was accused by his enemies of adultery and perjury. Charlemagne ordered them to Paderborn, but no decision could be made. He then had Leo escorted back to Rome. In November 800, Charlemagne himself went to Rome, and on 1 December held a council there with representatives of both sides. Leo, on 23 December, took an oath of purgation concerning the charges brought against him, and his opponents were exiled.
Charlemagne's father, Pepin the Short, defended the papacy against the Lombards and issued the Donation of Pepin, which granted the land around Rome to the pope as a fief. In 754 Pope Stephen II had conferred on Charlemagne's father the dignity of Patricius Romanus, which implied primarily the protection of the Roman Church in all its rights and privileges; above all in its temporal authority which it had gradually acquired (notably in the former Byzantine Duchy of Rome and the Exarchate of Ravenna) by just titles in the course of the two preceding centuries.
Two days after his oath, on Christmas Day 800, Leo crowned Charlemagne as emperor. According to Charlemagne's biographer, Einhard, Charlemagne had no suspicion of what was about to happen, and if informed would not have accepted the imperial crown. There is, however, no reason to doubt that for some time previous the elevation of Charlemagne had been discussed, both at home and at Rome, especially since the imperial throne in Constantinople was controversially occupied by a woman, Irene of Athens, and since the Carolingian dynasty had firmly established its power and prestige. The coronation offended Constantinople, which had seen itself still as the rightful defender of Rome, but Empress Irene, like many of her predecessors since Justinian I, was too weak to offer protection to the city or its much reduced citizenry.
In 808, Leo committed Corsica to Charlemagne for safe-keeping because of Muslim raids, originating from Al-Andalus, on the island. Nonetheless, Corsica, along with Sardinia, would still go on to be occupied by Muslim forces in 809 and 810.
Leo helped restore King Eardwulf of Northumbria and settled various matters of dispute between the archbishops of York and Canterbury. He also reversed Adrian I's decision in regards to the granting of the pallium to Bishop Hygeberht of Lichfield. He believed that the English episcopate had been misrepresented before Adrian and that therefore his act was invalid. In 803, Lichfield was a regular diocese again.
When asked to confirm the decision of the 809 Council of Aachen, Leo, though affirming the orthodoxy of the term Filioque and approving of its use in catechesis and personal professions of the faith, explicitly disapproved the addition of the filioque to the Creed of 381. Around this time, he ordered two heavy silver shields, containing the original text of the Creed in both Greek and Latin, to be made and placed in St. Peter's Basilica, adding: "Haec Leo posui amore et cautela orthodoxae fidei" ("I, Leo, put these here for love and protection of orthodox faith").
Leo III died in 816 after a reign of more than 20 years. He was originally buried in his own monument. However, some years after his death, his remains were put into a tomb that contained the first four popes named Leo. In the 18th century, the relics of Leo the Great were separated from his namesakes, and he was given his own chapel.
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