A crypt is a stone chamber beneath the floor of a church or other building. It typically contains coffins, sarcophagi, or religious relics.

A burial vault is a structural stone or brick-lined underground tomb or 'burial chamber' for the interment of a single body or multiple bodies underground. The main difference between entombment in a subterranean vault and a traditional in-ground burial is that the coffin is not placed directly in the earth, but is placed in a burial chamber specially built for this purpose. A burial vault refers to an underground chamber, in contrast to an above-ground, freestanding mausoleum. These underground burial tombs were originally and are still often vaulted and usually have stone slab entrances. They are often privately owned and used for specific family or other groups, but usually stand beneath a public religious building, such as a church, or in a churchyard or cemetery. A crypt may be used as a burial vault and a freestanding mausoleum may contain a burial vault beneath the ground.