Columbia subject headings:
Elze, Reinhard.
Rome (Italy)--History--476-1420.
Harvard subject headings:
Elze, Reinhard
Papacy--History--To 1309--Congresses.
Rome (Italy)--Civilization--Congresses.
Princeton subject headings:
Elze, Reinhard--Congresses.
Rome (Italy)--History--476-1420--Congresses.