Columbia subject headings:
Abbazia di Piantangeli.
Archaeology--Italy--Tolfa.
Tolfa (Italy)--Antiquities.
Harvard subject headings:
Abbazia di Piantangeli.
Italy--Antiquities.
Tolfa (Italy)--Antiquities.
Princeton subject headings:
Abbazia di Piantangeli.
Archaeology--Italy--Tolfa.
Tolfa (Italy)--Antiquities.