Columbia subject headings:
Lazio (Italy)--History--Congresses.
Military religious orders--Italy--Lazio--History--To 1500--Congresses.
Templars--Italy--Lazio--History--Congresses.
Harvard subject headings:
Lazio (Italy)--History--Congresses.
Military religious orders--Italy--Lazio--History--To 1500--Congresses.
Templars--Italy--Lazio--History--Congresses.
Princeton subject headings: