Columbia subject headings:
Fortification--Conservation and restoration--Italy--Susa.
Fortification--Italy--Susa--History.
Susa (Italy)--Buildings, structures, etc.
Harvard subject headings:
Fortification--Italy--Susa--Conservation and restoration.
Fortification--Italy--Susa--History.
Susa (Italy)--Buildings, structures, etc.
Princeton subject headings:
Fortification--Italy--Susa--Conservation and restoration.
Fortification--Italy--Susa--History.
Susa (Italy)--Buildings, structures, etc.