Pope Leo XII (22 August 1760 – 10 February 1829), born Annibale Francesco Clemente Melchiore Girolamo Nicola Sermattei della Genga, reigned from 28 September 1823 to his death in 1829.
(rojen kot Francesco Saverio Maria Felice Castiglioni), italijanski rimskokatoliški duhovnik, škof in kardinal, * 20. november 1761, Cingoli, † 30. november 1830.