What forms the chamber of a crypt?

A crypt is an above-ground burial space where remains are interred. The chamber of a crypt is formed by a vault, which is a structure designed to provide strength and durability while protecting the contents inside from the elements and potential disturbances. The vault typically has walls, a floor, and a ceiling, creating a secure and enclosed space specifically meant for holding caskets or remains.

In contrast, a grave liner is used below ground to protect the grave site and support the weight of the earth above but does not constitute a structure for storing remains. A casket is the container that holds the body but is not itself a chamber; it is placed within the vault. A grave marker serves to identify the grave and may provide information about the deceased but does not play a role in the structural function of a crypt. Thus, the vault is the correct term that describes the chamber of a crypt.