Columbia subject headings:
Castles--Italy--Lombardy.
Dwellings--Italy--Lombardy.
Historic buildings--Italy--Lombardy.
Lombardy (Italy)--History.
Harvard subject headings:
Castles--Italy--Lombardy.
Dwellings--Italy--Lombardy.
Historic buildings--Italy--Lombardy.
Lombardy (Italy)--History.
Princeton subject headings: