Columbia subject headings:
Castles--Austria--Tyrol--Pictorial works.
Castles--Austria--Tyrol.
Castles--Italy--Trentino-Alto Adige--Pictorial works.
Castles--Italy--Trentino-Alto Adige.
Harvard subject headings:
Castles--Austria--Tyrol--Pictorial works.
Castles--Austria--Tyrol.
Castles--Italy--Trentino-Alto Adige--Pictorial works.
Castles--Italy--Trentino-Alto Adige.
Princeton subject headings:
Castles--Austria--Tyrol--Pictorial works.
Castles--Austria--Tyrol.
Castles--Italy--Trentino-Alto Adige--Pictorial works.
Castles--Italy--Trentino-Alto Adige.