He then joined his uncle the cardinal at the
court of Charles V. He later traveled to
Rome and joined the court of
Pope Julius III, who made him a
privy chamberlain. During the pontificate of
Pope Pius IV, he became a cleric of the
Apostolic Camera, eventually becoming its president. Pope Pius IV made him a
cardinal deacon in the
consistory of 26 February 1561. He received the
red hat and the
titular church of
Santi Marcellino e Pietro al Laterano (declared a
deaconry pro illa vice) on 10 March 1561. As cardinal, he participated in the
Council of Trent 1562-63. In 1564, he signed the acts of the Council of Trent in the name of Pope Pius IV. From 22 August 1565 until 20 January 1566 he was
papal legate in
Camerino. He opted for the titular church of
Santa Pudenziana on 17 November 1565. He participated in the
papal conclave of 1565-66 that elected
Pope Pius V. of Cardinal Gianfrancesco Gambara On 7 October 1566 he was elected
Bishop of Viterbo. He was
consecrated as a bishop by Pope Pius V in the
Sistine Chapel on 13 October 1566. In 1566, in the wake of an epidemic, he was put in charge of sanitation for Rome. On 4 July 1567 he was named
inquisitor general. He opted for the titular church of
Santa Prisca on 3 July 1570. He was a participant in the
papal conclave of 1572 that elected
Pope Gregory XIII. On 17 October 1572 he opted for the titular church of
Sant'Anastasia. He resigned the government of his diocese sometime before 28 March 1576. He opted for the titular church of
San Clemente on 9 July 1578, and then for
Santa Maria in Trastevere on 17 August 1579. On 5 December 1580 he opted for the order of
cardinal bishops and received the
suburbicarian see of Albano. He opted for the
suburbicarian see of Palestrina on 4 March 1583. He was a participant in the
papal conclave of 1585 that elected
Pope Sixtus V. == Death ==