"Pope Pius VII (14 August 1742 – 20 August 1823), born Barnaba Niccolò Maria Luigi Chiaramonti,[a] was head of the Catholic Church and ruler of the Papal States from 14 March 1800 to his death in 1823. Chiaramonti was also a monk of the Order of Saint Benedict in addition to being a well-known theologian and bishop throughout his life.
Chiaramonti was made Bishop of Tivoli in 1782, and resigned that position upon his appointment as Bishop of Imola in 1785. That same year, he was made a cardinal. In 1789, the French Revolution took place, and as a result a series of anti-clerical governments came into power in the country. In 1796, during the French Revolutionary Wars, French troops under Napoleon Bonaparte invaded Rome and took as prisoner Pope Pius VI. He was taken as prisoner to France, where he died in 1799. The following year, after a sede vacante period lasting approximately six months, Chiaramonti was elected to the papacy, taking the name Pius VII." - (en.wikipedia.org 08.11.2019)
