The major stronghold of the Demonlorde Interrog during The Severance. Darheim stands as a massive multi-leveled fortress hewn into the slopes of the Glimstrom Mountains. The true depths of the catacombs and dungeons below the stonework are still a mystery even centuries after the end of the war.
Despite the destruction of its master, the fortress still retains a fairly strong amount of miasma that has saturated the water, soil and flora surrounding for many miles. As well, some remnant demonic entities still roam the deep halls and have found their ways to the surface on more than one occasion.
The official ruling from The Rose Order is that these demons in the absence of Interrog are simply aimless and feral, posing no risk to the world at large so long as they are contained and dealt with inside the borders of the corrupted lands within The Chalice now referred to as The Curse. Even so, they keep a close eye on these lands sending regular scouts, clerics, and inquisitors to sample miasma levels, repair warding, and explore the catacombs.