Columbia subject headings:
Castello Estense (Ferrara, Italy)--Exhibitions.
Castles--Italy--Ferrara--Exhibitions.
Ferrara (Italy)--Buildings, structures, etc.--Exhibitions.
Harvard subject headings:
Castello Estense (Ferrara, Italy)--Exhibitions.
Castles--Italy--Ferrara--Exhibitions.
Este family--Homes and haunts--Italy--Ferrara--Exhibitions.
Ferrara (Italy)--Buildings, structures, etc.--Exhibitions.
Interior decoration--Italy--Ferrara--Exhibitions.
Princeton subject headings:
Art--Italy--Ferrara--Exhibitions.
Castello Estense (Ferrara, Italy)--Exhibitions.
Castles--Italy--Ferrara--Exhibitions.