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He was ordained as a priest around 1556. On June 14, 1557, he was elected to be Bishop of Aosta. He was consecrated as a bishop in Rome by Cardinal Giovanni Angelo de' Medici. The Duke of Savoy named him ambassador of the Duchy of Savoy to the Holy See in 1559. He arrived at the Council of Trent on January 17, 1563, participating in the Council until its close. He was also the Duchy of Savoy's ambassador to the Council. From June 21, 1563, he was a member of the Council's commission on canons and marriage.
Pope Pius IV made him a cardinal priest in the consistory of March 12, 1565. He participated in the papal conclave of 1565-66 that elected Pope Pius V. He received the red hat and the titular church of San Silvestro in Capite on February 8, 1566. Together with Cardinals Giovanni Ricci, Giovanni Francesco Commendone, and Alessandro Sforza, was named by Pope Pius V inspector of rivers, ports and public roads of Rome. He was a participant in the papal conclave of 1572 that elected Pope Gregory XIII. On June 2, 1572, he opted for the titular church of San Marcello al Corso.
- Entry from Biographical Dictionary of the Cardinals of the Holy Roman Church
- Cheney, David M. "Marcantonio Cardinal Bobba". Catholic-Hierarchy.org. Retrieved June 16, 2018. [self-published]
- Carlo Tenivelli (1785). Biografia Piemontese (in Italian). Decade seconda. Torino: Briolo. pp. 235–250.
|Catholic Church titles|
| Bishop of Aosta
| Cardinal-Priest of San Silvestro in Capite
François de Joyeuse
Marco Antonio Amulio
| Cardinal-Priest of San Marcello
Giovanni Battista Castagna