In Paris, in the summer of 1614, Vanini subscribed to the principles of the Council of Trent, to prove the sincerity of his return to the Catholic faith. He then journeyed to Italy, going first to Rome, where he had to face the difficult final stages of the process in the court of the Inquisition, then to Genoa for a few months, where he found his friend Genocchi and taught philosophy to children of Scipio Doria for a time.
