1911 Encyclopædia Britannica/Tunnel Vault
TUNNEL VAULT, the term in architecture given to the semicircular or elliptical vault over underground passages, in contradistinction to the wagon or barrel vault of edifices above ground.
See also Tunnel vault on Wikipedia; and our 1911 Encyclopædia Britannica disclaimer.
TUNNEL VAULT, the term in architecture given to the semicircular or elliptical vault over underground passages, in contradistinction to the wagon or barrel vault of edifices above ground.