Saint Pope Leo III (†816) was bishop of Rome and ruler of the Papal States from 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. Most people in Constantinople did not approve the coronation, although the Byzantines, occupied with their own defenses, were in no position to offer much opposition to it. Charlemagne's gift enabled Leo to be a great benefactor to Rome's churches and charitable institutions. His Feastday is commemorated on June 12.
Saint Pope Leo IV (†855) was the bishop of Rome and ruler of the Papal States from 847 to his death. He is remembered for repairing Roman churches that had been damaged during the Arab raid against Rome, and for building the Leonine Wall around Vatican Hill to protect the city. Pope Leo organized a league of Italian cities that fought and won the Sea Battle of Ostia against the Saracens. His Feastday is commemorated on July 17.
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