The struggle with the Curia escalated at the Diet of Besançon, where Rainald entered into a fierce controversy with the papal legate Roland of Siena (later Pope Alexander III), vigorously rejecting Pope Adrian's use of the word "beneficium", which might mean fief as well as benefit. In the expression used, that the pope would have been glad to grant the emperor even greater "beneficia" (or benefits), it was thought that the old desire of the Curia for the mastery of the world was to be found.