Pope Hadrian died at the close of the year 795. Charlemagne was so overcome by the death of the venerable prelate that he shed tears when the sad news was told him. Hadrian had looked upon him as the defender of the Church; and in his relations to the King there was not a trace of that ambition which characterized later Popes, to the detriment of Christianity.  
Hadrian’s successor, Leo the Third, hastened to ingratiate himself with Charlemagne. He notified the King of his election and sent him a consecrated silver key as a symbol of his recognition of Charlemagne, both as the ruler of Roman territory and as a world sovereign.
 
It is of importance to understand the relations existing between Charlemagne and the Popes, for they were very different from those which existed between the later Popes and the German rulers. A letter of congratulation sent to Leo by Charlemagne throws some light upon them. It begins:
 
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“We have read the letter from Your Highness and listened to the decretals, and we heartily congratulate you upon your unanimous election, the dutiful obedience of your people, and your promises of loyalty to us.”
 
During the next few years there were outbreaks in Saxony and Spain. Wittekind and Albion remained faithful to their promises; but not so some of their people. The disturbances, however, were quelled without much difficulty. The Moors in Spain, also, who had gained some advantages, were speedily overcome.
 
In the year 799 an assault was made upon Pope Leo during a street procession. It was badly managed, however. The leaders of the mob had planned to blind the Pope and cut out his tongue, but they only succeeded in cutting him in the face. The Pope’s friends rescued him and conducted him to a safe place of concealment. The clerical officials, Paschal and Campulus, relatives of Hadrian, who were in attendance upon Leo, had been requested by the Pope not to officiate during the procession. He little dreamed of their treachery, for they were the abettors of the assault. The Duke of Spoleto, being informed of the outrage, proceeded at once to Rome with armed followers and escorted Leo to one of his castles.
 
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As soon as his wounds healed, Leo betook himself to Germany personally to implore Charlemagne’s assistance. At Nuremberg he learned that the King was holding court at Paderborn, and thither he hastened. Before he could reach the city, news of his approach was conveyed to the King, who at once began preparations to give him an honorable reception. He sent Archbishop Hildebrand and Count Auschar to meet him, but this was only the beginning of the ceremonies he had arranged. As Leo neared the city, a troop of cavalry went out to escort him. The King’s son, Pepin, greeted him and conducted him to the plaza, where Charlemagne sat upon the throne in royal state in the midst of his dignitaries. Rising and outstretching his arms, the King stepped down, embraced the Pope, and led him by the hand as he blessed the kneeling people.
 
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On the following day Leo related to the King the details of the murderous plot against him, of which the scars on his face bore evidence, and informed him that the conspirators had sought to justify their act by spreading base calumnies against him. He closed by asking Charlemagne’s help. The King replied that he could not personally accompany him to Rome, because of fresh disquiet in Saxony and the Spanish Mark, but he would furnish him an escort headed by Frankish chiefs, and promised to go to Rome personally as soon as possible. When the Pope’s enemies learned that Charlemagne had received him, their courage failed them. Leo was greeted with imposing ceremonies, and Paschal and Campulus were thrown into prison by the Franks.
 
The Saxon and Spanish affairs having been settled by the close of the next year (800), Charlemagne, mindful of his promise, went to Rome. The Pope met him at Novonte and had a private interview with him, at which a memorable event, soon to occur, doubtless was discussed. The Pope then returned to Rome to make preparations for Charlemagne’s reception, and on December sixth the King entered the city. His reception was an imposing one. The people welcomed him with their civic banners, the air was rent with loyal shouts, and the Pope, surrounded by the dignitaries of the Church, met him in front of St. Peter’s, which he entered accompanied by the music of the Papal choir. This was only the prelude to the memorable ceremony for which preparations had been quietly made............