Columbia subject headings:
Barletta (Italy)--Buildings, structures, etc.
Castello (Barletta, Italy)
Castles--Conservation and restoration--Italy--Barletta.
Harvard subject headings:
Barletta (Italy)--Buildings, structures, etc.
Castello di Barletta (Barletta, Italy)
Castles--Conservation and restoration--Italy--Barletta.
Castles--Remodeling for other use--Italy--Barletta.
Fortification--Italy--Naples (Kingdom)--History--16th century.
Naples (Kingdom)--History--Spanish rule, 1442-1707.
Princeton subject headings:
Barletta (Italy)--Buildings, structures, etc.
Castello di Barletta (Barletta, Italy)
Castles--Italy--Barletta--Conservation and restoration.