Fiction:The Firmament/Sanguine Hill

Sanguine Hill is the realm of Irkalla belonging to the demon lord Analuhati.

Description
Sanguine Hill resembles a landscape drenched in blood where great libraries are maintained by demon scholars. It is said that this library has a copy of every mortal document ever written, from the most elaborated lore books to the most insignificant peasant notes. Below the library are the pits known as the Testing Grounds, where demons torment the souls of those damned into Analuhati's grasp and record the results for their master.

Inhabitants
Sanguine Hill is inhabited by the more scholarly inclined of demons, who use the libraries for research. Virtually all vampires descending from Analuhati's Blood Pact with Varelos von Aschenbrener end up in the realm upon their final death, where they are tortured in the Testing Grounds for all eternity.