A necropolis is a place where dead people are buried. an area of land where dead people are buried, especially a large ancient one = cemetery. (Greek: "city of the dead") Extensive and elaborate burial place serving an ancient city. The locations of these cemeteries varied. Many in Egypt, such as the necropolis of western Thebes, were situated across the Nile River opposite the cities. In Greece and Rome a necropolis often lined the roads leading out of town. A necropolis was discovered in the 1940s under St. Peter's Basilica in Rome