Columbia subject headings:
Harvard subject headings:
Castles--Italy--Lazio.
Fortification--Italy--Lazio.
Lazio (Italy)--Buildings, structures, etc.
Lazio (Italy)--Description and travel.
Princeton subject headings:
Appian Way (Italy)--Description and travel.
Castles--Italy--Lazio.
Fortification--Italy--Lazio.
Lazio (Italy)--Description and travel.
Mural painting and decoration, Italian--Italy--Lazio.
Via Aurelia (Italy)--Description and travel.