This model is lighted for eevee but it should work fine for cycles, just hide what you won't use. The backroom and the front of the church are separated by collections, you can mute/hide the collections you won't use to save you some memory, doors are rigged, include volumetric cubes for both back and front of the church. Also an HDRI of the corresponding area outside of the church.

This model uses Final Fantasy 7 Intergrade (PC) higher quality textures.

Thanks to

necroalx for the texture files and HDRI.

Tips:

If you get artifacts or light orbs in your renders, turn the volumetric cube inside the scene off in the renders and viewport or just delete it.

Extract both the zips containing the textures, preferably using 7zip, and open the blend file. if you got pink textures anyway, follow this tutorial: https://www.youtube.com/watch?v=rWrj3jud0w8

UPDATE

Repacked and re-uploaded the textures once again, extract all 3 texture packs in the same folder as the blend file for this map, use 7ZIP to extract. If you still have problems with getting the textures, consider joining the army or something, because this may not be for ya.