Castles & palaces
Khotyn Fortress
Fortress
Wikipedia names Khotyn Fortress as where 3 films and series were filmed; each title’s page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Khotyn Fortress. Each title’s page links to the sentence that says so.
Filming locations nearby
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Towns & cities
Khotyn
Ukraine · 2 km south-west
City of Ukraine
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Castles & palaces
Kamianets-Podilskyi Castle
Ukraine · 17 km north
Castle and fortress in Kamianets-Podilskyi, Ukraine
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Towns & cities
Kamianets-Podilskyi
Ukraine · 19 km north
City in the Khmelnytskyi Oblast in western Ukraine
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Towns & cities
Toporivtsi
Ukraine · 34 km south-west
Village in Novoselytsia Raion, Chernivtsi Oblast, Ukraine