749. Burchard, bishop of Wilrzburg, and Fulrad, priest and chaplain, were sent [by Pepin] to Pope Zacharias to ask his advice in regard to the kings who were then ruling in France, who had the title of king but no real royal authority. The Pope replied by these ambassadors that it would be better that he who actually had the power should be called king.
750 . In this year Pepin was named king of the Franks with the sanction of the Pope, and in the city of Soissons he was anointed with the holy oil by the hands of Boniface, archbishop and martyr of blessed memory, and was raised to the throne after the custom of the Franks. But Childeric, who had the name of king, was shorn of his locks and sent into a monastery.
753. In this year Pope Stephen came to Pepin at Kiersy, to urge him to defend the Roman church from the attacks of the Lombards. 754. And after Pope Stephen had received a promise from king Pepin that he would defend the Roman church, he anointed the king and his two sons, Charles and Carloman, with the holy oil. And the pope remained that winter in France.
From Thatcher and McNeil, eds., A Source Book for Medieval History, (New York: Scribners, 1905), p. 37-38 [Some spelling of names adjusted]