This was caused primarily by Conrads avowed desire to acquire the kingdom of Burgundy, but other reasons for dissatisfaction existed, and the revolting duke found it easy to gather around him the scattered forces of discontent.
In another direction Conrads policy was to free himself as king from dependence upon the church.
He was without the impulsiveness which marred Conrads great qualities, but he had the same decisive judgment, wide ambition and irresistibli will as his father.
After Conrads death Germany passed under the rule of one of the greatest of her sovereigns, Frederick I., called Barbarossa, nephew of the late king and son of Frederick, that duke Frederick!.
The struggle to maintain the position of the Hohenstaufen in Italy was continued after this event; but in October 1268, by the execution of Conrads son Conradin, the family became extinct.
After Conrads death William of Holland received a certain allegiance, especially in the north of the country, and was recognized by the Rhenish cities which had just formed a league for mutual protection, a league which for a short time gave promise of great strength and regnum.