Columbia subject headings:
Castles--Italy--Lunigiana.
Fortification--Italy--Lunigiana.
Lunigiana (Italy)--Buildings, structures, etc.
Harvard subject headings:
Castles--Italy--Lunigiana--Pictorial works.
Fortification--Italy--Lunigiana--Pictorial works.
Princeton subject headings:
Castles--Italy--Lunigiana.
Fortification--Italy--Lunigiana.
Lunigiana (Italy)--Buildings, structures, etc.