Mithraism, also known as the Mithraic mysteries, was a Roman mystery religion centered on the god Mithras. Although inspired by Iranian worship of the Zoroastrian divinity (yazata) Mithra, the Roman Mithras is linked to a new and distinctive imagery, with the level of continuity between Persian and Greco-Roman practice debated.[a] The mysteries were popular among the Imperial Roman army from about the 1st to the 4th century CE.[2]
Worshippers of Mithras had a complex system of seven grades of initiation and communal ritual meals. Initiates called themselves syndexioi, those "united by the handshake".[3] They met in underground temples, now called mithraea (singular mithraeum), which survive in large numbers. The cult appears to have had its centre in Rome,[4] and was popular throughout the western half of the empire, as far south as Roman Africa and Numidia, as far north as Roman Britain,[5](pp 26–27) and to a lesser extent in Roman Syria in the east.[4]
Mithraism is viewed as a rival of early Christianity.[6] In the 4th century, Mithraists faced persecution from Christians and the religion was subsequently suppressed and eliminated in the Roman empire by the end of the century.[7]
Numerous archaeological finds, including meeting places, monuments and artifacts, have contributed to modern knowledge about Mithraism throughout the Roman Empire.[8] The iconic scenes of Mithras show him being born from a rock, slaughtering a bull, and sharing a banquet with the god Sol (the Sun). About 420 sites have yielded materials related to the cult. Among the items found are about 1000 inscriptions, 700 examples of the bull-killing scene (tauroctony), and about 400 other monuments.[5](p xxi) It has been estimated that there would have been at least 680 mithraea in the city of Rome.[9][full citation needed] No written narratives or theology from the religion survive; limited information can be derived from the inscriptions and brief or passing references in Greek and Latin literature. Interpretation of the physical evidence remains problematic and contested.[10]
The term "Mithraism" is a modern convention. Writers of the Roman era referred to it by phrases such as "Mithraic mysteries", "mysteries of Mithras" or "mysteries of the Persians".[1][11] Modern sources sometimes refer to the Greco-Roman religion as Roman Mithraism or Western Mithraism to distinguish it from Persian worship of Mithra.[1][12][13]