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.
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.
Official Vatican roles
|Catholic Church titles|
Clarissimo Falconieri Mellini
| Camerlengo of the Sacred College of Cardinals
1859 – 1860
Gaspare Bernardo Pianetti
Angelo Mai (–1854)
| Librarian of the Vatican Library
1860 – 1866
(1869–) Jean-Baptiste-François Pitra