Vatican I

(A.D. 1869–1870) The ecumenicalcomes from a Greek word for “worldwide,” and refers to both ancient church councils representing the whole church as well to discussions during th... more council of Roman Catholic bishops called and presided over by Pope Pius IX(A.D. 1792–1878) Also known by the Italian form of his name, “Pio Nono,” pope from 1846–1878, the longest reigning pope in history, who define... more that was held between 1869–1870, and attacked modern ideas. It formally adopted the doctrineis derived from the Latin word for teaching, doctrina, and is an important aspect of Christianity more so than other world religions because Christian... more of papal infallibility and declared that Catholics needed to follow the theology of Thomas Aquinas(c. A.D. 1225-1274) Dominican friar, teacher at the University of Paris, central figure of medieval scholasticism, and the most authoritative theologi... more including the idea that the existence of God can be known by natural reason.