 In 1296, Frederick III of Aragon had Salemi downgraded to a feudal city.In 1392, Salemi became an independent municipality.In 1441, on December 11, in the castle of Salemi a confederation made up of Salemi, Trapani, Mazara, Monte San Giuliano and by the barons of Castelvetrano and Partanna was formed which undertook the defense, and bore the costs, of the Queen White and Royal House of Aragon.