Mithraeum
Noun
Meaning
Mithraeum (plural Mithraea or Mithraeums)
A grotto where the god Mithra was worshipped.
Examples
A mosaic in the Ostia Mithraeum of Felicissimus depicts these grades, with symbolic emblems that are connected either to the grades or are just symbols of the planets.
For their feasts, Mithraic initiates reclined on stone benches arranged along the longer sides of the Mithraeum – typically there might be room for 15 to 30 diners, but very rarely many more than 40 men.
Temples to Mithras also exist in military contexts at Vindobala on Hadrian's Wall (the Rudchester Mithraeum ) and at Segontium in Roman Wales (the Caernarfon Mithraeum ).
Clauss, M., The Roman cult of Mithras, pp. 31 32. It cannot be shown that any Mithraeum continued in use in the 5th century.
It is known that intitates could transfer with their grades from one Mithraeum to another.
Some scholars maintain that practice may have differed over time, or from one Mithraeum to another.