Fiction:The Firmament/Blackharp Mansion

Blackharp Mansion is Black Harp's realm in the Underworld.

Description
From the outside, the mansion resembles a decrepit but formerly opulent Dusklander estate, far beyond its prime. Its interior is likewise dusty and devoid of light sources, except for tiny candles. It is far bigger on the inside than it is on the outside. The mansion exists both in the Underworld and as a real location in eastern Duskwood, the location which was Black Harp's home in life.

Inhabitants
Unlike other realms of the Underworld, Blackharp Mansion rarely houses any psychopomps. Instead, restless ghosts, haunts and poltergeists are attracted to the location. The Telamon version of the mansion is directly linked to its extraplanar counterpart, explaining such phenomena.