Bible Encyclopedias
Tunnel Vault
1911 Encyclopedia Britannica
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.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Tunnel Vault'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/t/tunnel-vault.html. 1910.