Built into a hill amongst other nearby residencies. @phoenix 's home is specifically designed to exclude any and all light that could possibly try to enter. It has one wall sconce for a torch, though it is rarely ever used. From the inside, one can see that the Sanctum Tenebris is larger inside than most people tend to think, it's furnishings are all very comfortable, and it includes a secret passage that links to the cavern where Agrajag has lived for numerous years.