The Illusionist filmed at Konopiště Castle, Benešov. This castle serves as Prince Leopold's hunting lodge and was once the last home of an archduke. On screen it's Prince Leopold's hunting lodge.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
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Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Benešov and it tells you what was shot around you, how to get there, and whether you can actually go in.
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