 On 23 March 1580 he was named legate "a latere" before Philip II of Spain.He became Prefect of the Apostolic Signatura in May 1581.He became legate "a latere" to the Kingdom of Portugal on 25 October 1581 and served as legate "a latere" in Perugia and Umbria from 25 October 1581 to 1583.