In 938 it was given by the German king, Otto I., the Great, to Arnulf's brother, Bertold I., with greatly reduced privileges.
His first suggestion that a council nominated by the estates should be set up with the power of vetoing the acts of the king was abandoned because of the strenuous opposition of Maximilian; but Bertold was successful in getting the diet to proclaim an eternal Landfriede, that is, to forbid private war without any limitation of time, and it was agreed that the diet should meet annually to advise the king on matters of moment.
When Bertold died in 947 Otto conferred the duchy upon his own brother Henry, who had married Judith, a daughter of Duke Arnulf.
Heartened by this circumstance Bertold and his followers returned to the attack when the diet met at Augsburg in 1500.
However that may be, he soon repudiated this Danish princess, for whom he seems to have conceived an unconquerable aversion on the very morrow of his marriage to her, and in 1196, in defiance of the pope, who had refused to nullify his union with Ingeborg, married Agnes daughter of Bertold IV., duke of Meran.
Bernhardt, Bruder Bertold von Regensburg (1905); A.