The Mysteries of Mithras is an independent Initiatic Order which is inspired by and uses the allegory of the lost and ancient Mithraic Mysteries also known as Mithraism a previously influential Roman Cult of the same name.
The mithraeum brought the cave of Mithras into the inhabited Roman world. Its benches, images and ritual furnishings created a place where a community could gather around the god and understand its sanctuary as an image of the cosmos.
Shared meals, offerings and ceremonies of initiation brought the mysteries into the lives of his worshippers. Within the mithraeum, members took their places in a community whose activities recalled the deeds of the god and reflected the order of the heavens.
Although no complete ancient account of Mithras’ myth survives, the monuments of the Roman world preserve many scenes from the sacred narrative of the Mithraic mysteries.
After Christianity was adopted, most pagan monuments were destroyed or abandoned. Garni, however, was preserved at the request of the sister of King Tiridates II and used as a summer residence for Armenian royalty.
Khachatryan, Zhores (1981) Artashat II: Ancient Necropolises (Excavations of 1971–1977). Archaeological Excavations in Armenia 17. Yerevan: Publishing House of the Academy of Sciences of the Armenian SSR.