quality:correction, structural:expansion, information:classification
Posthumous trial

After the papacy had been removed to Avignon in 1309, Pope Clement V, under extreme pressure from King Philip IV, consented to a posthumous trial. He said, "t was permissible for any persons who wanted to proceed against the memory of Boniface VIII to proceed." He gave a mandate to the Bishop of Paris, Guillaume de Baufet d'Aurillac, and to Guillaume Pierre Godin, OP, that the complainants should choose prosecutors and determine a day on which the Inquiry would begin in the presence of the Pope (coram nobis Avinione). The Pope signed his mandate at his current place of residence, the Priory of Grauselle near Malusan (Malausène) in the diocese of Vasio (Vaison), on 18 October 1309. Both the King of Aragon and the King of Castile immediately sent ambassadors to Pope Clement, complaining that scandal was being poured into the ears of the Faithful, when they heard that a Roman pontiff was being charged with a crime of heresy. Complaints also came from Italy, Germany, and the Netherlands.

On 27 April 1310, in what was certainly a peace gesture toward the French, Clement V pardoned Guillaume Nogaret for his offences committed at Anagni against Boniface VIII and the Church, for which he had been excommunicated, with the condition that Nogaret personally go to the Holy Land in the next wave of soldiers and serve there in the military. By the end of Spring 1310, Clement was feeling the embarrassment and the pressure over the material being produced by Boniface's accusers. His patience was wearing thin. He issued a mandate on 28 June 1310, in which he complained about the quality of the testimony and the corruption of the various accusers and witnesses. Then he ordered the Quaesitores that future examinations should proceed under threat of excommunication for perjury. A process (judicial investigation) against the memory of Boniface was held by an ecclesiastical consistory at Priory Groseau, near Malaucène, which held preliminary examinations in August and September 1310. and collected testimonies that alleged many heretical opinions of Boniface VIII. This included the offence of sodomy, although there is no substantive evidence for this, and it is likely that this was the standard accusation Philip made against enemies. The same charge was brought against the Templars.

Before the actual trial could be held, Clement persuaded Philip to leave the question of Boniface's guilt to the Council of Vienne, which met in 1311. On 27 April 1311, in a public Consistory, with King Philip's agents present, the Pope formally excused the King for everything that he had said against the memory of Pope Boniface, on the grounds that he was speaking with good intentions. This statement was written down and published as a bull, and the bull contained the statement that the matter would be referred by the Pope to the forthcoming Council. The Pope then announced that he was reserving the whole matter to his own judgment.

The XV Ecumenical Council, the Council of Vienne, opened on 16 October 1311, with more than 300 bishops in attendance. When the Council met (so it is said), three cardinals appeared before it and testified to the orthodoxy and morality of the dead pope. Two knights, as challengers, threw down their gauntlets to maintain his innocence by trial by combat. No one accepted the challenge, and the Council declared the matter closed. Clement's order disbanding the Order of the Knights Templar was signed at the Council of Vienne on 2 May 1312.