Viterbo); Clement IV, pope from 1265 to 1268 (resided almost always at Viterbo); Gregory X, pope from 1271 to 1276 (Gregory X remained in Viterbo little more than a month, between February and March 1272); Innocent V, pope from 21 January to 22 June 1276 (stayed at Viterbo for two weeks, just after his election, and there he met Charles of Anjou); Adrian V, pope from 11 July 1276 to 18 August 1276 (spent almost the whole of his short pontificate in the convent next to the church of San Francesco alla Rocca); John XXI, pope from 15 September 1276 to 20 May 1277 (resided almost always at Viterbo); Nicholas III, pope from 1277 to 1280 (divided his residence between Viterbo, Rome and Soriano nel Cimino); Martin IV, elected on 22 February 1281 (abandoned Viterbo immediately after his election). Martin IV, born Simon de Brion, was the last pope of the “Viterbo period”. He was elected after a turbulent conclave which lasted six months. The civic head of the city, Annibaldo Annibaldi, a supporter of the Angevin faction, had interfered in the conclave, preventing the Cardinal Protodeacon, Matteo Rubeo Orsini, from taking part and entering the conclave by force of arms to arrest two cardinals. As a result, Martin IV was to issue a decree which ordered the abandonment of Viterbo as a papal residence. From then onwards Viterbo was never again a longterm papal residence. Moreover, given the hostility of the Roman populace to a French pope, Martin chose to be crowned in Orvieto. Notes External links Palazzo dei Papi official website Description and photos VR panorama of the Popes' Palace at Tuscia 360 Papi Papi Sites of papal elections 1266 establishments in Europe 13th-century establishments in Italy Viterbo Papacy Tourist attractions in Lazio Loggias in Italy