He took part in the subsequent campaign, but when the treaty of Passau was signed in August 1552 he separated himself from his allies and began a crusade of plunder in Franconia.
When Charles lef t Germany a few weeks later, Albert renewed his depredations in Franconia.
It is noteworthy that a similar bone bed has been traced on the same geological horizon in Brunswick, Hanover and Franconia.
He retained his influence during the whole of the reign of Louis; and on the king's death in 911 was prominent in securing the election of Conrad, duke of Franconia, to the vacant throne.
By the treaty of Verdun in 843 it fell to Louis the German, and later it seems to have been partly in the duchy of Saxony and partly in that of Franconia.