The Emperor, on the other hand, took the following oath to the Pope: In nomine Christi spondeo atque polliceor, Ego Carolus Imperator coram Deo & beato Petro Apostolo, me protectorem ac defensorem fore hujus sanctae Romanae Ecclesiae in omnibus utilitatibus, quatenus divine fultus fuero adjutorio, prout sciero poteroque. The Emperor was also made Consul of Rome, and his son Pipin crowned King of Italy: and henceforward the Emperor styled himself: Carolus serenissimus, Augustus, a Deo coronatus, magnus, pacificus, Romae gubernans imperium, or Imperator Romanorum; and was prayed for in the Churches of Rome. His image was henceforward put upon the coins of Rome: while the enemies of the Pope, to the number of three hundred Romans and two or three of the Clergy, were sentenced to death. The three hundred Romans were beheaded in one day in the Lateran fields: but the Clergymen at the intercession of the Pope were pardoned, and banished into France. And thus the title of Roman Emperor, which had hitherto been in the Greek Emperors, was by this act transferred in the West to the Kings of France.
After these things Charles gave the City and Duchy of Rome to the Pope, subordinately to himself as Emperor of the Romans; spent the winter in ordering the affairs of Rome, and those of the Apostolic see, and of all Italy, both civil and ecclesiastical, and in making new laws for them; and returned the next summer into France: leaving the city under its Senate, and both under the Pope and himself. But hearing that his new laws were not observed by the judges in dictating the law, nor by the people in hearing it; and that the great men took servants from free men, and from the Churches and Monasteries, to labor in their vineyards, fields, pastures and houses, and continued to exact cattle and wine of them, and to oppress those that served the Churches: he wrote to his son Pipin to remedy these abuses, to take care of the Church, and see his laws executed.