The First Vatican Council was an ecumenical council of the Roman Catholic Church that took place from 1869 to 1870. Convened by Pope Pius IX, the council aimed to address various issues within the Church, including the relationship between faith and reason, and the authority of the papacy. One of the most significant outcomes of the council was the declaration of papal infallibility, which stated that the Pope is preserved from error when proclaiming doctrines related to faith and morals. The council was interrupted by the outbreak of the Franco-Prussian War, leading to its abrupt conclusion.