The Peace of Canfranc Historical milestone · Canfranc, La Jacetania, Huesca Image of Canfranc, not of the place itself. Alfonso III of Aragon and Edward I of England met at Canfranc in 1288 and agreed to free Charles of Salerno, a prisoner since the war of Sicily, who renounced the island and left two of his sons as hostages in Barcelona. octubre de 1288 Photo: Mmvalnet (CC BY-SA 4.0) What to see and do in Canfranc