Pope Martin IV
John of Pontoise was from Pontoise in Seine-et-Oise in France, but spent much of his life in England. In 1280, he was briefly Chancellor of the University of Oxford. He was an Archdeacon of Exeter and a papal chaplain before Pope Martin IV provided him to the see of Winchester on 9 June 1282 and consecrated before 15 June 1282. He was enthroned at Winchester Cathedral in September 1282.