Its walls, floor and ceiling were completely veneered with imperial porphyry, which was "generally of a purple colour throughout, but with white spots like sand sprinkled over it."
Dinding, lantai dan langit-langitnya sepenuhnya dilapisi dengan porfiri kekaisaran, yang "umumnya berwarna ungu di seluruh, tetapi dengan bintik-bintik putih seperti pasir yang ditaburi di atasnya."