Ernesto Pacelli (died 13 June 1925),[1] 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 calls him the "first of the great laymen to be associated with the finances of the Holy See."[2]
He was nephew of Francesco Pacelli, grandson of Filippo Pacelli and great-grandson of Marcantonio Pacelli. His cousin, Eugenio Pacelli, became Pope Pius XII.