Charles, archbishop of Mainz

Charles was the second son of Pepin I of Aquitaine and Engelberga.

The Electorate of Mainz, previously known in English as Mentz and by its French name Mayence, was one of the most prestigious and influential states of the Holy Roman Empire. In the hierarchy of the Catholic Church, the Archbishop-Elector of Mainz was also the Primate of Germany, a purely honorary dignity that was unsuccessfully claimed from time to time by other archbishops. There were only two other ecclesiastical Prince-electors in the Empire: the Electorate of Cologne and the Electorate of Trier.