The Duchess filmed at Theatre Royal Bristol, Bristol. This 1760s theatre, the oldest continuously operating in England, plays Drury Lane where the Devonshires watch a play. On screen it's Theatre Royal, Drury Lane.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Planning the trip? The United Kingdom travel atlas covers money, language and getting aroundand everything filmed in Bristol is on one page
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Bristol and it tells you what was shot around you, how to get there, and whether you can actually go in.
Download Venture for iOS Android