Curse of the Crimson Altar
Starring Christopher Lee, Boris Karloff, Mark Eden, Virginia Wetherell, Barbara Steele, Michael Gough, Roger Avon, Michael Warren, Rosemarie Reede, Denys Peck
It's a mystery and horror movie, and has a rating of 5.5 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Spain.