Castles & palaces
Miramare Castle
Castle in Trieste, Italy
1 film or series was filmed at Miramare Castle. Wikipedia names 1 more.

Movies filmed at Miramare Castle
Filmed here, per Wikipedia
Wikipedia says these were filmed in Miramare Castle too. Each title’s page links to the sentence that says so.
Filming locations nearby
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Landmarks & buildings
Trieste Centrale railway station
Italy · 7 km south-east
Railway station
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Streets & squares piazza Unità d'Italia
Italy · 7 km south-east
Square in Trieste, Italy
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Towns & cities
Trieste
Italy · 7 km south-east
City and seaport in northeastern Italy
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Landmarks & buildings
Synagogue of Trieste
Italy · 8 km south-east
Synagogue in Trieste, Italy
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Towns & cities
Sistiana
Italy · 9 km north-west
Human settlement in Duino-Aurisina, Province of Trieste, Friuli–Venezia Giulia, Italy
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Towns & cities
Duino
Italy · 11 km north-west
Village in Italy