Catacombs are man-made underground passages primarily used for religious purposes, particularly for burial. Any chamber used as a burial place is considered a catacomb, although the word is most commonly associated with the Roman Empire.
Ossadas nas Catacumbas da Igreja sa Mesiricordia, ilha Terceira, Angra do Heroísmo, Açores
Image of a gravesite in the York Catacombs
Catacombs (PSF)
Inside Salina Catacombs, Naxxar
Roma subterranea novissima - in qua antiqua christianorum et praecipue martyrum, coemeteria, tituli, monimenta, epitaphia, inscriptiones, ac nobiliora sanctorum sepulchra, tribus libris distincta, (14781333091)