Columbia subject headings:
Friars--Europe--History--Congresses.
Military religious orders--Europe--History--Congresses.
Regionalism--Europe--History.
Harvard subject headings:
Europe--Church history--600-1500--Congresses.
Europe--Church history--600-1500.
Europe--History--476-1492--Congresses.
Europe--History--476-1492.
Friars--Europe--History--Congresses.
Friars--Europe--History.
Hospitalers--Europe--History--Congresses.
Hospitalers--Europe--History.
Military religious orders--Europe--History--Congresses.
Military religious orders--Europe--History.
Princeton subject headings:
Europe--Church history--600-1500.
Europe--History--476-1492.
Friars--Europe--History.
Hospitalers--Europe--History.
Military religious orders--Europe--History.