The majority of this map is a copyrighted map created by DramaScape. It is available for free download via DriveThru RPG. I added the stairwell, assembled by taking an existing asset and rotating it into place, and fitted everything into the surrounding darkness.
All image rights remain with DramaScape. No infringement is intended or implied.
I recommend several of DramaScape's products, which usually include a VTT version and a printable version. The text description may not fully match the visual, but they make great starting points!