 On 19 February 1645, he was selected by the King of Spain as Bishop of Trujillo and on 21 August 1645 he was confirmed by Pope Innocent X.On 30 September 1646, he was consecrated bishop by Pedro de Villagómez Vivanco, Archbishop of Lima.On 26 December 1647, he was appointed during the papacy of Pope Innocent X as Bishop of Arequipa.