This map is the final dungeon of Chapter 2 (Empty Graves) of The Mummy's Mask Pathfinder adventure path by Paizo. It's a temple that was converted into a tomb when the original pharaoh's time was up. On the ground level is a proper temple with worship space, funerary preparation areas, and rooms where the pharaoh would display his mummified animals that he would bring with him into the afterlife.

Below, in the Under Level, the dungeon becomes more of a proper dungeon with some living space for priests, a map of the above city, and a final confrontation room with the master villain standing atop a pyramid-like structure.