 On 10 January 1656, he was appointed during the papacy of Pope Alexander VII as Bishop of Accia and Mariana.On 16 January 1656, he was consecrated bishop by Giulio Cesare Sacchetti, Cardinal-Bishop of Frascati, with Ascanio Piccolomini, Archbishop of Siena, and Giovanni Agostino Marliani, Bishop Emeritus of Accia and Mariana, serving as co-consecrators.In 1676, he began construction of Notre-Dame-des-Grâces-de-Lavasina church, dedicated to the Virgin Mary, on the site where two miracles had occurred.