Columbia subject headings:
Castles--Italy--Mantua (Province)
Fortification--Italy--Mantua (Province)
Gonzaga family.
Harvard subject headings:
Castles--Italy--Mantua (Province)
Castles--Italy--Mantua (Province)--History.
Fortification--Italy--Mantua (Province)
Fortification--Italy--Mantua (Province)--History.
Gonzaga family.
Mantua (Italy : Province)--History.
Princeton subject headings:
Castles--Italy--Mantua (Province).
Fortification--Italy--Mantua (Province).
Gonzaga family.