Vatican -1813 -  Pius VII (Italian: Pio VII; born Barnaba Niccolò Maria Luigi Chiaramonti; 14 August 1742 – 20 August 1823) was head of the Catholic Church from 14 March 1800 to his death in August 1823. He ruled the Papal States from June 1800 to 17 May 1809 and again from 1814 to his death.