archway
A passage through or under an arch, especially when long, as under a barrel vault.
barrel vault
Glossary
annular vault
A barrel vault in the shape of a ring, instead of a straight line; covers a space of which the
General
barrel roof, barrel shell roof
1. A roof of semicylindrical section; capable of spanning long distances parallel to the axis of the cylinder. 2.A barrel
General
banded barrel vault
A masonry barrel vault whose semicircular cross section is stiffened at regular intervals by arches which project beneath the vaults