Indeed. It is Mapper's Challenge II - aka the Halls of Amon-Gorloth. dysonlogos.blog/2015/07/10/f...
[Friday Map] Mapper’s Challenge II – The Deep HallsBuilt by priests of Amon-Gorloth, this dungeon was constructed and adapted from existing caverns following their dreams channeled from Amon-Gorloth itself – making them a twisted and nightmar…dysonlogos.blog