Soon after this Desiderius was forced to capitulate, and Charlemagne had himself proclaimed King of the Lombards in his place. Charlemagne's attitude toward the States of the Church now underwent a change. With the title of King of the Lombards he also assumed the title as "Patricius Romanorum", which his father had never used, and read into this title rights which under Pepin had never been associated with it. Moreover, differences of opinion arose between Adrian and Charlemagne concerning the obligations which had been assumed by Pepin and Charlemagne in the document of Quiercy. Adrian construed it to mean that Charlemagne should take an elastic concept of the "res publica Romana" to the extent of giving up not only the conquests of Aistulf in the exarchate and in the Pentapolis, but also earlier conquests of the Lombards in Central Italy, Spoleto and Benevento.