This last weekend, I watched a documentary on NetFlix called “Secrets of Highclere House” (if I’m remembering the name and spelling correctly), about the country “house” that is used as the setting for the series- it was actually quite interesting, especially when they pointed out that it is the ancestral home of Lord Carnavon, who bankrolled the discovery of King Tut’s tomb. Came upon it by accident- I’ve never watched the series, but Netlix knows that I like documentaries...
There’s another in that series called “Secrets of Althorp” which is also very good.