Letters To Juliet filmed at Villa Arvedi, Grezzana. The palace of the wealthy Count Lorenzo is this villa near Grezzana, which now hosts conferences and events. On screen it's Count Lorenzo's palace.
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 Grezzana and it tells you what was shot around you, how to get there, and whether you can actually go in.
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