Columbia subject headings:
Arona (Italy)--History--16th century.
Arona (Italy)--History--17th century.
Rocca di Arona (Arona, Italy)--History.
Harvard subject headings:
Arona (Italy)--Buildings, structures, etc.
Arona (Italy)--History--16th century.
Arona (Italy)--History--17th century.
Arona (Italy)--History--Sources.
Fortification--Conservation and restoration--Italy--Arona--History--Sources.
Lombardy (Italy)--History--Spanish rule, 1535-1714--Sources.
Rocca di Arona (Arona, Italy)
Rocca di Arona (Arona, Italy)--History.
Princeton subject headings:
Arona (Italy)--Buildings, structures, etc.
Arona (Italy)--History--Sources.
Fortification--Conservation and restoration--Italy--Arona--History--Sources.
Lombardy (Italy)--History--Spanish rule, 1535-1714--Sources.
Rocca di Arona (Arona, Italy)