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Architectural Terms Beginning With "O"

Below are definitions and photographic illustrations of architectural term beginning with the letter "O".

Oculus - A circular opening in a building, often found at the top of domes.

Ogee Arch - A pointed arch with double-curved haunches.

Open Cornice - A hollow eaves overhang that exposes a roof's rafters.

Openwork - Ornamental work with openings showing through its structure.

Overdoor - An ornamented, painted, or carved panel above a doorway.