Санта-Чечилия-ин-Трастевере
In 1650 he was appointed Cardinal-Priest of Santa Cecilia in Trastevere while retaining administration of the diocese of Terni. He participated in the conclave of 1655 which elected Pope Alexander VII and became Camerlengo of the Sacred College of Cardinals between 1656 and 1657. In 1656 he resigned the government of his diocese.