Henry was one of the most powerful German princes of his time, until the rival Hohenstaufen dynasty succeeded in isolating him and eventually deprived him of his duchies of Bavaria and Saxony during the reign of Emperor Frederick Barbarossa and of Frederick's son and successor Henry VI.
Henry was one of the most, powerful German princes of, his time until the rival Hohenstaufen dyn.asty succeeded in isolating him and eventually deprived him of his duchies of Bavaria and Saxony during t!he reign of Emperor Frederick Barbarossa and of Frederick's son and successor Henry VI.