He wrote in 1311, by command of
Clement V and in connection with the
Council of Vienne,
De modo celebrandi concilii et corruptelis in Ecclesia reformandis, in three books. It attacks the abuses of the Church with extreme sincerity and vigour. It is a treatise on the canonical process of summoning and holding general councils, gathered from approved sources with many quotations and illustrations from the
Church Fathers and from church history, together with attacks on various abuses and corruptions that were common in the fourteenth century among ecclesiastical persons. This treatise illustrates the role of traditional ideas in the formation of
conciliarism, the idea that a church council could regulate the papacy. The first edition was printed at Lyons in 1531, then again at Paris by
Philip Probus, a canonist of Bourges, in 1545, and dedicated to
Pope Paul III as a help towards the
Council of Trent. Other editions, Paris, 1671, etc. In 1319, he wrote
treatise on the recovery of the Holy Land for King
Philip V, entitled
Informacio brevis. ==References==