Columbia subject headings:
Harvard subject headings:
Castles--Italy--Lucca (Province)--History.
Fortification--Italy--Lucca (Province)--History.
Lucca (Italy : Province)--History.
Military architecture--Italy--Lucca (Province)--History.
Princeton subject headings:
Castles--Italy--Lucca (Province)--History.
Fortification--Italy--Lucca (Province)--History.
Lucca (Italy : Province)--History.
Military architecture--Italy--Lucca (Province)--History.