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Ernesto Pacelli (31 August 1860 – 13 June 1925), Nobleman of Acquapendente and Nobleman of Sant'Angelo in Vado, was a financial adviser to Pope Leo XIII, Pope Pius X, and Pope Benedict XV and the founder and president of the Banco di Roma from 9 March 1880 until 1916. Pacelli also served as an unofficial link between the Vatican and the Italian government. Papal historian John Pollard ca

Giacomo Antonelli (2 April 1806 – 6 November 1876) was an Italian Catholic prelate who served as Cardinal Secretary of State for the Holy See from 1848 until his death. He played a key role in Italian politics, resisting the unification of Italy and affecting Catholic interests in European affairs. He was often called the "Italian Richelieu" and the "Red Pope."

Introitus et Exitus Cameræ Apostolicæ (Latin: What Comes In and What Goes Out of the Apostolic Camera) is a six-hundred-and-six-volume financial record of the Apostolic Camera of the Holy See, from 1279 to 1524, located in the Vatican Secret Archives. The volumes span the reigns of thirty-two popes from Pope Nicholas III to Pope Clement VII. The volumes relating to the Avignon Popes (130

Pierre de Murat de Cros, O.S.B., (c. 1320 – 1388) was a French monk of aristocratic origins who became a cardinal of the Avignon Obedience during the Great Schism, as well as the Archbishop of Arles and the Chamberlain of the Apostolic Camera (Latin: Camerarius Apostolicus). Refusing from the day of his election to support Bartolomeo Prignano (Pope Urban VI, the former head of the rival