Gregory sent the Pallium to the archbishop of Salzburg; he also sent one to Venerius, the patriarch of Grado, in 828, in support of his claims to have jurisdiction over the bishops of Istria. When a synod awarded jurisdiction to Maxentius, the patriarch of Aquileia, Venerius appealed to Gregory, who supported him. Meanwhile, King Lothair backed Maxentius, who forced the bishops of Istria to obey him, while at the same time ignoring Gregory’s orders to cease. Gregory also supported the candidacy of John IV (bishop of Naples). Gregory was also asked to arbitrate during his journey to Francia in 833 the case against Aldric of Le Mans, who was being forced out of his see by partisans of Lothair. On 8 July 833 Gregory wrote to the bishops of “Gaul, Europe and Germany” declaring that Aldric had every right to appeal to the pope, and that until the pope had issued a judgement one way or the other, no-one could pass a sentence against him. Further, that this mandate had to be obeyed in order to remain in communion with the Roman church. The letter together with the restoration of Louis allowed Aldric to remain in his see for some time. Gregory was also asked by emperor Louis’s representative, Amalarius of Metz, to provide an antiphonary for use at church services at Metz, to which Gregory was forced to admit that he had none suitable for the emperor, as he had already given a number to Wala of Corbie, which he had already taken to Francia. On 25 January 844 Gregory IV died, and was buried in St. Peter’s Basilica. He was succeeded by Sergius II. Notes References Levillain, Philippe, The Papacy: Gaius-Proxies, Routledge (2002) Mann, Horace K., The Lives of the Popes in the Early Middle Ages, Vol. II: The Popes During the Carolingian Empire, 795-858 (1906) DeCormenin, Louis Marie; Gihon, James L., A Complete History of the Popes of Rome, from Saint Peter, the First Bishop to Pius the Ninth (1857) External links Opera Omnia by Migne Patrologia Latina with analytical indexes Popes 844 deaths 9th-century archbishops Year of birth unknown 9th-century popes Burials at St. Peter's Basilica