Mithraea), sometimes spelled Mithreum and Mithraion (Ancient Greek: Μιθραίον), is a temple erected in classical antiquity by the worshippers of Mithras.
While most Mithraea are underground, some feature openings in the ceiling to allow light to enter, a reminder of the connection to the universe and the passage of time.
Many mithraea that follow this basic plan are scattered over much of the Roman Empire's former territory, mainly where the legions were stationed along the frontiers (such as Britain).
Similarly, the Persians call the place a cave where they introduce an initiate to the Mysteries, revealing to him the path by which souls descend and go back again.
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