 The exiled Avignon Papacy during 1309–1376 also put a strain on the Papacy, which however finally returned to Rome.Pope Innocent X was critical of the Peace of Westphalia in 1648 as it weakened the authority of the Holy See throughout much of Europe.Following the French Revolution, the Papal States were briefly occupied as the "Roman Republic" from 1798 to 1799 as a sister republic of the First French Empire under Napoleon, before their territory was reestablished.