Columbia subject headings:
Harvard subject headings:
Castello d'Acquabella--History.
Castello d'Acquabella--Pictorial works.
Castles--Italy--Vallombrosa Region--Pictorial works.
Vallombrosa (Italy)--Buildings, structures, etc.--Pictorial works.
Princeton subject headings:
Castello d'Acquabella--History.
Castello d'Acquabella--Pictorial works.
Vallombrosa (Italy)--Buildings, structures, etc.--Pictorial works.