 On 21 October 1579, he was appointed during the papacy of Pope Gregory XIII as Bishop of Novara.He served as Bishop of Novara until his death on 18 September 1583.While bishop, he was the principal co-consecrator of Ottavio Santacroce, Bishop of Cervia (1576), and Ottaviano Paravicini, Bishop of Alessandria (della Paglia) (1584).