About forty Christian catacombs have been found near the roads that once led into Rome. After the decline of the Roman empire these cemeteries were forgotten, not to be rediscovered until 1578. Catacomb has come to refer to different kinds of underground chambers and passageways. The catacombs of Paris are abandoned stone quarries that were not used for burials until 1787. The catacombs built by a monastery in Palermo, Sicily, for its deceased members later began accepting bodies from outside the monastery; today you may wander through looking at hundreds of mummified corpses propped against the catacomb walls, dressed in tattered clothes that were once fashionable.