Here’s a simple isometric map for you to use should you need a spooky, desecrated church in any horror-themed Dungeons & Dragons adventure. I intentionally skipped drawing details in the rooms on the floor plans. Treat it as a blank canvas to fill with whatever creepy things you can come up with!
In my own campaign I plan to use the Chantry of Desecration as a non-combat encounter. A place where atrocious deeds have been committed in the past, but where remnant energies still linger.