Columbia subject headings:
Fortification--Conservation and restoration--Italy--Vendicari.
Towers--Conservation and restoration--Italy--Vendicari.
Vendicari (Italy)--Buildings, structures, etc.
Harvard subject headings:
Fortification--Conservation and restoration--Italy--Vendicari.
Towers--Conservation and restoration--Italy--Vendicari.
Vendicari (Italy)--Buildings, structures, etc.
Princeton subject headings:
Fortification--Conservation and restoration--Italy--Noto.
Noto (Italy)--Buildings, structures, etc.
Towers--Conservation and restoration--Italy--Noto.