Illustrated Architecture Dictionary

Bull's eye / Oculus / Oeil-de-boeuf


1. A figure or ornament of concentric bands (Concentric: Of or denoting circles, arcs, or other shapes that share the same center, the larger often completely surrounding the smaller.)

2. A small circular opening or window

3. A thick knob or boss of glass at the center of a blown glass sheet

4. A thick, circular piece of glass set, as in a roof or ship's deck, to admit light.

5. Oculus or oeil-de-boeuf

Bull's eye corner blocks are found in Federal and Greek Revival styles


Examples from Buffalo:


Photos and their arrangement 2003 Chuck LaChiusa
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