CRYPTA, a subterraneous cell or vault, especially under a church, for the interment of particular families or persons. S. Ciampini, describing the outside of the Vatican, speaks of the crypta of St Andrew, St Paul &c. The word is formed of κρυπτε, abscondo, "I hide;" whence κρυπτε, crypta.
Vitruvius uses the word crypta for a part of a building, answering nearly to our cella; Juvenal for a cloaca. Hence crypto porticus, a subterraneous place arched or vaulted, used as an under-work or passage in old walls. The same is also used for the decoration at the entry of a grotto.