WORLD CIVILIZATION

Detailed explanation-1: -A barrel vault (also called a cradle vault, tunnel vault, or wagon vault) has a semicircular cross section. A groin (or cross) vault is formed by the perpendicular intersection of two barrel vaults. A rib (or ribbed) vault is supported by a series of arched diagonal ribs that divide the vault’s surface into panels.

Detailed explanation-2: -It is closely related to the arch, since the surface of a vault can be described as an arch extended in depth. And when the arch is rotated, then the so-called dome is created. In fact, the term vault derives from Latin vulgar verb volvitare, the intensive form of volvere, which means to turn, to wind, to round.