necropolis

noun necropolis

• graveyard — a burial ground, often associated with smaller rural churches, as distinct from a larger urban or public cemetery.
• crypt — A crypt is an underground room underneath a church or cathedral.
• sepulcher — a tomb, grave, or burial place.
• catacomb — Catacombs are ancient underground passages and rooms, especially under a city, where people used to be buried.
• vault — the act of vaulting.