I suspect there will be a chorus of individual items that will resolve into a central theme: Hammer Films of the 60's and 70's.
PS I just recalled a few recent era Dr Who, particularly visiting Charles Dickens that had earnest intentions in this way. For a not-Victorian gothic horror, I thought the library episode was also effective.
The Vampire Lovers (1970)Hammer films is also good. As a bonus it's got Ingrid Pitt showing her boobies ;D
Stepping away from Hammer for a moment... I might add Brotherhood of the Wolf, Sleepy Hollow, Black Death (evocative but more 1342!), From Hell, the 1979 Nosferatu remake, Ginger Snaps Back (colonial lycans)...
I'd like to also see people's favourites as far as Gothic/Victoran/period horror novels...