Career
In 927 German King Henry the Fowler vested him with ducal rights in Carinthia. When in 938, Arnulf's son and successor Eberhard tried to retain the autonomous status of the Bavarian duchy, he was removed and banished by King Otto I the Great, who appointed Berthold in his place. Unlike the powerful late duke Arnulf, Berthold was not given the right to appoint bishops or administer royal property, but he remained loyal to the Ottonian dynasty throughout his reign.
He even planned to marry Otto's sister Gerberga, widow of Duke Gilbert of Lorraine, and later Hedwige, another sister, but these plans fell through. In 943, he dealt defeat to the Magyars and staved off their attacks for a while, as Arnulf had done before him. With Berthold's accession to the throne, Bavaria and the Carinthian march were once again united.
In 976 Henry the Younger received the severed Duchy of Carinthia in compensation. Duke Berthold is buried at Niederaltaich Abbey.
