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His Eminence

Mario Mattei
His Eminence; Mario Mattei
Dean of the College of Cardinals
Church	Roman Catholic Church
Appointed	30 September 1860
Term ended	7 October 1870
Predecessor	Vincenzo Macchi
Successor	Costantino Patrizi Naro
Other post(s)	President of the Congregation of the Reverend Basilica of Saint Peter (1843–70); Archpriest of Saint Peter's Basilica (1843–70); Pro-Datary of the Apostolic Dataria (1858–70); Cardinal-Bishop of Ostia-Velletri (1860–70);
Previous post(s)	Cardinal-Deacon of Santa Maria in Aquiro (1832–42); Camerlengo of the College of Cardinals (1834–35; 1848–50); Cardinal-Priest of Santa Maria degli Angeli (1842–44); Cardinal-Bishop of Frascati (1844–54); Cardinal-Bishop of Porto e Santa Rufina (1854–60); Prefect of the Apostolic Signatura (1854–58);
Orders
Ordination	c. 1817
Consecration	23 June 1844; by Vincenzo Macchi
Created cardinal	2 July 1832; by Pope Gregory XVI
Rank	Cardinal-Deacon (1832–42); Cardinal-Priest (1842–44); Cardinal-Bishop (1844–70)
Personal details
Born	Mario Mattei; 6 September 1792; Pergola, Marche
Died	7 October 1870 (aged 78); Rome, Kingdom of Italy
Buried	Saint Peter's Basilica
Parents	Marco Mattei; Francesca Orsini Bianchi
Alma mater	Pontifical Academy of Ecclesiastical Nobles; La Sapienza University;

Mario Mattei (6 September 1792, Pergola, Marche – 7 October 1870) was an Italian Cardinal, of the Roman noble House of Mattei. He became Dean of the College of Cardinals in 1860.

Personal life

Mario Mattei was born on 6 September 1792 in Pergola, Marche.

He was educated at the Collegio Ghislieri, a Roman college, and at the La Sapienza University where he received a doctorate in utroque iure) and later attended the Pontifical Academy of Ecclesiastical Nobles in 1810.^[1] Around 1817, he was ordained a priest.

He was elevated to Cardinal by Pope Gregory XVI in 1832 and was subsequently appointed to the following posts:^[2]

In 1843, Mattei was appointed as Arch-Priest of St. Peter's Basilica and held this position until his death in 1870.

Records indicate that Mattei was appointed Camerlengo of the Sacred College of Cardinals twice; between 1834 and 1835 and between 1848 and 1850 and he was also appointed to be the Dean of the College of Cardinals in 1860. He was a participant in the First Vatican Council between 1869 and 1870 and in the Papal Conclave of 1846 that elected Pope Pius IX.

Catholic Church titles
Preceded by Ludovico Micara	Cardinal-Bishop of Frascati 17 June 1844 – 23 June 1854	Succeeded by Antonio Maria Cagiano de Azevedo
Preceded by Luigi Lambruschini	Cardinal-Bishop of Porto e Santa Rufina 23 June 1854 – 17 December 1860	Succeeded by Giuseppe Milesi Pironi Ferretti
Preceded by Vincenzo Macchi	Cardinal-Bishop of Osta e Velletri and Dean of the College of Cardinals 17 December 1860 – 7 October 1870	Succeeded by Costantino Patrizi Naro
Preceded by Giacomo Giustiniani	Arch-Priest of St. Peter's Basilica 11 March 1843 – 7 October 1870	Succeeded by Niccola Paracciani Clarelli
Preceded by Luigi Gazzoli	Camerlengo of the Sacred College of Cardinals 20 January 1834 – 6 April 1835 (1st Term)	Succeeded by Nicola Grimaldi
Preceded by Castruccio Castracane degli Antelminelli	Camerlengo of the Sacred College of Cardinals 1848–1850 (2nd Term)	Succeeded by Giacomo Luigi Brignole