 Mahiot died in 1386 and Pedro succeeded him as the "de facto" ruler of the Company and the Morea.On 26 July 1387, Pedro, with the backing of both the secular and ecclesiastic authority in Greece, confirmed a treaty with Venice whereby she was ceded rights in the port of Navarino.On 6 September that year, Pope Urban VI declared that as James of Baux's successors had forfeited their rights to the Holy See, the principality belonged to him and he devolved its government on Paul Foscari, the archbishop of Patras, who in turn made Pedro vicar general.