Pope Leo XII (Italian: Leone XII; born Annibale Francesco Clemente Melchiorre Girolamo Nicola della Genga (pronunciation ; 2 August 1760 10 February 1829), was head of the Catholic Church and ruler of the Papal States from 28 September 1823 to his death in 1829.Leo XII was in ill health from the time of his election to the papacy to his death less than 6 years later, though he was noted for enduring pain well. He was a deeply conservative ruler, who enforced many controversial laws, including one forbidding Jews to own property. Though he raised taxes, the Papal States remained financially poor.