Charles now sought to increase his authority in Italy, where Frankish counts were set over various districts, and where Hildebrand, duke of Spoleto, appears to have recognized his overlordship. In 780 he was again in the peninsula, and at Mantua issued an important capitulary which increased the authority of the Lombard bishops, relieved freemen who under stress of famine had sold themselves into servitude, and condemned abuses of the system of vassalage.