Definition & Meaning of "annular vault"

What is an "annular vault"?

An annular vault is an architectural feature shaped like a ring or circle, created by a series of arches that connect to form a continuous curved ceiling. This type of vault often surrounds a central space, such as a dome or a circular room, providing structural support while allowing for an open interior. Annular vaults are commonly used in various architectural styles, including Roman and Byzantine designs, where they can enhance the sense of space and light within a building. Their unique shape contributes to the overall aesthetic appeal and can be elaborately decorated, adding to the beauty of the structure.