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other uses thumb|The oculus at the top of the dome of the [[Pantheon, Rome|Pantheon in Rome]] An oculus (plural oculi , from Latin/i>, 'eye') is a circular opening in the center of a dome or in a wall. Originating in antiquity, it is a feature of Byzantine and Neoclassical architecture. It is also known as an Åil-de-boeuf from the French, or simply a "bull's-eye".
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