It forms the resting places of many lesser members of the house of Mohammed Ali, and is where the last Shah of Iran was interred following his death in 1980.
They are all vampires who rise at night. 
mnli hypothesis: They are all vampires who rise at night.  premise: It forms the resting places of many lesser members of the house of Mohammed Ali, and is where the last Shah of Iran was interred following his death in 1980.