Pope Pius IX, a Franciscan Pope, was the Pontiff who oversaw the First Ecumenical Council at the Vatican, the person behind the Syllabus of Errors, as well as being the longest reigning pope in history.
Pope Pius IX, a Franciscan Pope, was the Pontiff who oversaw the First Ecumenical Council at the Vatican, the person behind the Syllabus of Errors, as well as being the longest reigning pope in history.