King of the Franks, was the son of Charles Martel, and at first shared with his brother Carloman the viceroyalty of the kingdom under Hilderik III.; in 747 Carloman retired to a monastery, and five years later Pepin deposed Hilderik and ascended the throne; his kingdom embraced the valleys of the Rhine, the Rhone, and the Seine; he united his interests with those of the Church, and in 756 entered Italy to rescue the Pope from the threatened domination of the Lombards; reduced Aistulf of Lombardy to vassalage, assumed the title of Patrician of Rome, and by bestowing on Pope Stephen III. the "Exarchate" of the Roman empire, laid the foundation of papal temporal sovereignty, five cities being placed under his jurisdiction; his subsequent exploits included the conquest of the Loire Valley and the expulsion of the Moors from France; his fame was overshadowed by that of his son Charlemagne; d. 678.