Columbia subject headings:
Authority--Religious aspects--Catholic Church--History of doctrines.
Catholic Church--Dioceses--Europe.
Church history--Middle Ages, 600-1500.
Europe--Church history--600-1500.
Papacy--History--To 1309.
Popes--Primacy--History of doctrines--Middle Ages, 600-1500.
Harvard subject headings:
Authority--Religious aspects--Catholic Church--History of doctrines--Congresses.
Catholic Church--Dioceses--Europe--Congresses.
Church history--Middle Ages, 600-1500--Congresses.
Europe--Church history--600-1500--Congresses.
Papacy--History--To 1309--Congresses.
Popes--Primacy--History of doctrines--Middle Ages, 600-1500--Congresses.
Princeton subject headings:
Authority--Religious aspects--Catholic Church--History of doctrines--Congresses.
Catholic Church--Dioceses--Europe--Congresses.
Church history--Middle Ages, 600-1500--Congresses.
Europe--Church history--600-1500--Congresses.
Papacy--History--To 1309--Congresses.
Popes--Primacy--History of doctrines--Middle Ages, 600-1500--Congresses.