mithraeum

Temple dedicated to the worship of Mithras. Although similar to the basilica the temple was windowless and often partly subterranean in order to emulate the cave where Mithras slew the bull.

Mithraeum

A Mithraeum (or the plural Mithraea) is a place of worship for the followers of the mystery religion of Mithraism. The Mithraeum was either an adapted natural cave or cavern, or a building imitating a cave. When possible, the Mithraeum was constructed within or below an existing building, such as the Mithraeum found beneath Basilica of San Clement...
Found on http://en.wikipedia.org/wiki/Mithraeum

Mithraeum

A temple where Mithras was worshipped. The temples at Carrawburgh, Housesteads and Rudchester, (all Northumberland), were small so as to imitate the cave where Mithras killed the bull. Progress for the only male worshippers was obtained by undergoing particular trials - such as lying by a fire - which Mithras was thought to have undergone. The rem...
Found on http://www.encyclo.co.uk/local/20766
No exact match found