catacombs

Catacombs are ancient, human-made subterranean passageways for burial or protection. Any chamber used as a burial place can be described as a catacomb, although the word is most commonly associated with the Roman empire. Many are under cities and have been popularised by stories of their use as war refuges, smugglers' hideouts, or meeting places for cults. The first place to be referred to as //catacombs// was the system of underground tombs between the 2nd and 3rd milestones of the Appian Way in Rome, where the bodies of the apostles Peter and Paul, among others, were said to have been buried.

Rabat, Malta catacombs

other catacombs:
 * Spain – Catacombs of Sacromonte in Granada
 * Au stria – Catacombs of St. Stephen's Cathedra[|l], Vienna
 * England – Catacombs of London and others