sources puts us faced with a saint with a very widespread cult in some areas, for instance, the Crown of Aragon and Castille, but also in other european places. As for the last, we detect an import focus of devotion in Brittany, where the saint arrived to preach after being called by Jean V. He died at Vannes (1419), the political capital of the duchy of Brittany, and he was buried in Saint Pierre’s cathedral. Previously to his canonization, his fame as a miracle worker during his life was the reason for his tomb became a real locus sanctus, a place where pilgrims arrived to venerate his relics. These relics had healing and prophylactic properties. Apart from these ones, we have many references of “contact relics” with properties of this kind.