Columbia subject headings:
Art, Italian--Italy--Biella Region.
Castles--Italy--Biella Region.
Fortification--Italy--Biella Region.
Harvard subject headings:
Castles--Italy--Biella Region.
Fortification--Italy--Biella Region.
Mural painting and decoration, Italian--Italy--Biella Region.
Painting, Italian--Italy--Biella Region.
Princeton subject headings:
Art, Italian--Italy--Biella (Italy : Region).
Castles--Italy--Biella (Italy : Region).
Fortification--Italy--Biella (Italy : Region).