aka Cathedral of Demons / Demon Cathedral / Demons 3
Though not a continuation or even directly linked to Demons (1985) and Demons 2 (1986), it's officially the third film in the series. But don't expect the same kind of cheap gore as what came before. Dir. Michele Soavi's film is more of a slow-burning, psychological affair, which is a polite way of saying that it has bucket-loads of atmosphere (most old churches/cathedrals do) but is so deathly slow, with empty characters, that at times it's a struggle to even maintain interest. It's too much foreplay and not enough bang. The script is a mess, too. When it does deliver the goods, though, wow, it's bloody amazing!
NOTE: If you've any interest in seeing it, I recommended going in without first watching the trailer, otherwise you'll have ALL the best scenes spoiled for you, and at least one of them you really don't want to see coming. An image search is an equally bad idea. But it's fun to watch the trailer afterwards to compare - it makes it look like a bona fide masterpiece of the genre.
2½ hidden mechanisms out of 5