| The Mithraea were spread all over the Roman empire and some 50 of these caves still exist in Rome today. |
| The building lacks the benches characteristic of Mithraea, and nothing of clearly Mithraic character has been found at Uruk. |
| Three Mithraea have been excavated, at London, Carrawburgh, and Housesteads. |
| In most of the Mithraea there was a portico which led into a second sacristy, where the ritual dresses were probably kept. |
| The widespread popularity of the cult is evident from the records of Mithraea which have been identified all over the empire, and which are still coming to light. |
