In 777 Queen Hildegarde bore him a son, Pepin, whom in 781 Charlemagne had baptized and anointed king of Italy at Rome by the Pope, thus separating not only the two titles, but also the two kingdoms, and restoring to the Lombards a national existence, feeling quite sure that, so long as he lived, the unity of his different dominions would not be imperilled.

Having thus regulated at Rome his own affairs and those of the Church, he returned to his camp, took Pavia, received the submission of all the Lombard dukes and counts, save one only, Aregisius, duke of Beneventum, and entered France again, taking with him as prisoner King Didier, whom he banished to a monastery, first at Liege and then at Corbie, where the dethroned Lombard, say the chroniclers, ended his days in saintly fashion.
The prompt success of this war in Italy, undertaken at the appeal of the Head of the Church, this first sojourn of Charlemagne at Rome, the spectacles he had witnessed, and the homage he had received, exercised over him, his plans, and his deeds, a powerful influence.

This rough Frankish warrior, chief of a people who were beginning to make a brilliant appearance upon the stage of the world, and issue himself of a new line, had a taste for what was grand, splendid, ancient, and consecrated by time and public respect; he understood and estimated at its full worth the moral force and importance of such allies.

He departed from Rome in 774, more determined than ever to subdue Saxony, to the advantage of the Church as well as of his own power, and to promote, in the South as in the North, the triumph of the Frankish Christian dominion.
Three years afterwards, in 777, he had convoked at Paderborn, in Westphalia, that general assembly of his different peoples at which Wittikind did not attend, and which was destined to bring upon the Saxons a more and more obstinate war.

"The Saracen Ibn-al-Arabi," says Eginhard, "came to this town, to present himself before the king.