1922, silent Swedish horror/documentary on Witches.
This was surprisingly brilliant - in it's special effects, it's treatment of the subject matter, appropriately salacious with some of the best costumed devils and demons I've seen.
Best of all you can watch it online here for free: https://www.youtube.com/watch?v=Jl6NvqUM5IM
Note - the end - or simply "End" - in Swedish surprisingly works well in English, an unintended pun of sorts.