His Eminence Giacomo Giustiniani
President of the Congregation of the Reverend Basilica of Saint Peter
Church	Catholic Church
Appointed	1 July 1837
Term ended	24 February 1843
Predecessor	Pietro Francesco Galleffi
Successor	Mario Mattei
Other post(s)	Titular Archbishop of Tyre (1817–26) Archbishop-Bishop of Imola (1826–32) Cardinal-Priest of Santi Marcellino e Pietro (1827–39) Prefect of the Congregation of the Index (1834–37) Archpriest of Saint Peter's Basilica (1837–43) Camerlengo of the Apostolic Camera (1837–43) Cardinal-Bishop of Albano (1839–43) Camerlengo of the College of Cardinals (1842–43)
Orders
Ordination	21 December 1816
Consecration	20 April 1817 by Alessandro Mattei
Created cardinal	2 October 1826 by Pope Leo XII
Rank	Cardinal-Priest (1827–39) Cardinal-Bishop (1839–43)
Personal details
Born	Giacomo Giustiniani 29 December 1769 Rome, Papal States
Died	24 February 1843(1843-02-24) (aged 73) Rome, Papal States
Buried	Santa Maria sopra Minerva
Parents	Benedetto Giustiniani Cecilia Carlotta Mahoni
Alma mater	La Sapienza University

Styles of Giacomo Giustiniani
Reference style	His Eminence
Spoken style	Your Eminence
Informal style	Cardinal
See	Cardinal bishop of Albano

Giacomo Giustiniani (1769–1843) was an Italian priest, papal diplomat and Cardinal. Considered papabile in the Papal Conclave (1830–31), his election was vetoed by Ferdinand VII of Spain.^[1]

He was the younger brother of Vincenzo Giustiniani, 6th Prince Giustiniani, de jure 6th Earl of Newburgh.^[2]

His ecclesiastical career and preparation for the priesthood was interrupted by the Napoleonic Wars, and he was ordained in 1816. In 1817 he was papal nuncio in Spain and became titular archbishop of Tyre. He became bishop of Imola in 1826.

He was created Cardinal by Pope Leo XII in 1826. He became bishop of Albano in 1839 and he became Camerlengo in 1837.

• Catholic Hierarchy page ^{[self-published]}
• Biography