Thus, in 1094, he went to Rome in order to help Pope Urban II (1088–99) to take possession of the Lateran, still held by the faction of the antipope Clement III (1080–1100); the money which he offered to the custodian brought about the surrender.
He took part in the councils held at Clermont in 1095, by Pope Urban; at Saintes, in 1096, by the Apostolic Legate Amatus of Bordeaux; and at Reims, in 1131, by Innocent II (1130–43).
He also strenuously defended the ecclesiastical principles in the question of investitures, which he qualified in several small tracts as heresy and simony; he wrote in the same spirit to Pope Paschal II when the latter made concessions (1111) to Emperor Henry V (1106–25).
Finally, he always defended firmly the prerogatives, the rights, and the property of his abbey at Vendôme against the encroachments of either bishops or secular princes.
His writings consist of a number of letters; of a series of tracts on the investitures of ecclesiastics by laymen, on the Sacraments of the Holy Eucharist, Baptism, Confirmation, and Extreme Unction, on ascetic and pastoral subjects; hymns to the Blessed Virgin and St. Mary Magdalene; sermons on the feasts of Our Lord, the Blessed Virgin, Mary Magdalene, and St. Benedict.