Title: The Council of Constance and the Council of the Vatican
Subjects: Popes, Infallibility, Papacy, Council of Constance (1414-1418 : Konstanz, Germany) http://id.loc.gov/authorities/names/n50040012, Vatican Council (1st : 1869-1870 : Basilica di San Pietro in Vaticano) http://id.loc.gov/authorities/names/n50000581