Antonio Tosti (4 October 1776 – 20 March 1866) was Catholic Cardinal-Priest of San Pietro in Montorio in Rome and later Camerlengo of the Sacred College of Cardinals and Librarian of the Vatican Library.
|Archivist of the Vatican Secret Archives|
Librarian of the Vatican Apostolic Library
|Church||Roman Catholic Church|
|Appointed||13 January 1860|
|Term ended||20 March 1866|
|Other post(s)||Cardinal-Priest of San Pietro in Montorio (1839–66)|
|Created cardinal||12 February 1838 (in pectore)|
18 February 1839 (revealed)
by Pope Gregory XVI
4 October 1776
|Died||20 March 1866 (aged 89)|
Rome, Papal States
|Buried||San Michele a Ripa|
|Alma mater||Collegio Romano|
Tosti was born on 4 October 1776 in Rome, where he died on 20 March 1866.
Little else is known of Tosti's personal life and few official records exist prior to his elevation to Cardinal (in pectore) and appointment as Cardinal-Priest of San Pietro in Montorio on 18 February 1839 where he served until his death.