He was Bishop of Borgo San Sepolcro (1539–1546), Bishop of Saluzzo (1546–1556), and Archbishop of Milan (1556–1558).
From 1539 to 1546, he held the position of Bishop of Borgo San Sepolcro. He then became Bishop of Saluzzo from 1546 to 1556 and finally Archbishop of Milan from 1556 to 1558.