Negotiations for the succession of Edmund, son of Henry III of England, to the throne of the Kingdom of Sicily involved L'Aquila in the web of interests linking the Roman Curia to the English court. On December 23, 1256, Pope Alexander IV elevated the churches of Saints Massimo and Giorgio to the status of cathedrals as a reward to the citizens of L'Aquila for their opposition to King Manfred who, in July 1259, had the city razed to the ground in an attempt to destroy the negotiations. On August 29, 1294, the hermit Pietro del Morrone was consecrated as pope Celestine V in the church of Santa Maria di Collemaggio, in commemoration of which the new pope decreed the annual religious rite of the Pardon (nowadays known as Celestinian Forgiveness, "Perdonanza Celestiniana"), still observed today in the city on August 28 and 29: it is the immediate ancestor of the Jubilee Year.