Columbia subject headings:
Forlì (Italy : Province)--Buildings, structures, etc.
Fortification--Conservation and restoration--Italy--Forlì (Province)
Historic buildings--Conservation and restoration--Italy--Forlì (Province)
Harvard subject headings:
Forlì (Italy : Province)--Buildings, structures, etc.
Fortification--Conservation and restoration--Italy--Forlì (Province)
Historic buildings--Conservation and restoration--Italy--Forlì (Province)
Princeton subject headings: