Mithras and Sol Invictus
The cult of Mithras in the Roman Empire — Persian origins, underground temples, the bull-slaying mystery, and the worship of the Unconquered Sun.
Overview
The cult of Mithras was one of the most widespread mystery religions of the Roman Empire, practiced from Britain to Syria between the 1st and 4th centuries CE. Its defining image — Mithras slaying a bull (tauroctony) — has been found in hundreds of underground temples (mithraea) across the empire. The cult was popular among soldiers, merchants, and imperial administrators, and its temples were found in every major military installation along the Roman frontiers.[3]
Despite its ubiquity, Mithraism remains one of the most debated phenomena in the study of ancient religion. No sacred texts survive; everything must be reconstructed from archaeology, iconography, and hostile references by Church Fathers.[3]
Origins: The Problem of Persia
The name “Mithras” derives from the Indo-Iranian god Mithra/Mitra, attested in the Rigveda (as Mitra) and the Avesta (as Mithra). The Persian Mithra was a god of contracts, friendship, and the dawn — a cosmic guardian of oaths and social bonds.[1]
But whether Roman Mithraism was “really” Persian is hotly debated:[1]
- The traditional view (Cumont, 1896) held that Roman Mithraism was essentially a Roman adaptation of Persian Zoroastrian worship, transmitted through Cilician pirates and Anatolian intermediaries
- The revisionist view (Beck, Clauss, since the 1970s) argues that Roman Mithraism was a new creation of the 1st–2nd centuries CE, using a Persian divine name and oriental atmosphere but with fundamentally Greco-Roman theology
- The truth likely lies between: the cult drew on genuine Iranian traditions (the bull sacrifice, the name, the cosmic associations) but transformed them thoroughly within a Roman mystery framework[1]
The Mithraeum
Mithraic temples (mithraea) were deliberately designed to resemble caves — small, dark, underground spaces seating typically 20–40 worshippers on raised benches along both sides. This subterranean setting reflected the myth that Mithras was born from rock (petra genetrix) and that the cave represented the cosmos.[1]
Over 400 mithraea have been found, with major concentrations at:
- Rome (over 35 known)
- Ostia (17 known)
- Along the Rhine and Danube frontiers (military camps)
- London (the Walbrook Mithraeum, now the London Mithraeum Bloomberg SPACE)[2]
The Tauroctony
The central cult image was the tauroctony — Mithras killing a bull. This scene appears in every mithraeum and follows a remarkably consistent iconographic program:[1]
- Mithras, in Persian-style clothing and Phrygian cap, kneels on the bull and plunges a dagger into its neck
- A dog and a snake drink the blood flowing from the wound
- A scorpion attacks the bull’s genitals
- A raven watches from above
- Sol (the Sun) and Luna (the Moon) appear in the corners
- Two torchbearers (Cautes and Cautopates) stand on either side — one with torch raised, one lowered
David Ulansey (1989) proposed that the tauroctony is a star map: the bull = Taurus, the dog = Canis Major, the snake = Hydra, the raven = Corvus, the scorpion = Scorpio. The killing of the bull represents the astronomical precession of the equinoxes — the end of the Age of Taurus. Mithras, then, is the cosmic power that moves the heavens.
Grades of Initiation
Mithraism had a structured hierarchy of seven grades of initiation, each associated with a planet (in the ancient order):
| Grade | Latin | Planet | Symbol |
|---|---|---|---|
| 1 | Corax (Raven) | Mercury | Caduceus |
| 2 | Nymphus (Bride) | Venus | Lamp |
| 3 | Miles (Soldier) | Mars | Lance |
| 4 | Leo (Lion) | Jupiter | Thunderbolt |
| 5 | Perses (Persian) | Moon | Crescent |
| 6 | Heliodromus (Sun Runner) | Sun | Radiate crown |
| 7 | Pater (Father) | Saturn | Staff, cap |
Initiates progressed through grades via rituals that included symbolic death and rebirth, blindfolding, and trials. A mosaic floor at the Felicissimus Mithraeum in Ostia depicts these grades with their symbols.
Sol Invictus
Sol Invictus (“The Unconquered Sun”) was a solar deity promoted to supremacy in Roman religion by Emperor Aurelian in 274 CE, who established a grand temple on the Campus Martius and a new priesthood (pontifices Solis Invicti). The festival of Sol Invictus on December 25 (the winter solstice in the Julian calendar) later became the date of Christmas.
The relationship between Mithras and Sol Invictus is complex:
- In mithraic iconography, Mithras and Sol are separate figures — Mithras feasts with Sol after the bull-slaying
- But in popular devotion, the two became closely associated, especially among soldiers
- Aurelian’s Sol Invictus may draw on Syrian solar worship (the cult of Elagabalus at Emesa) as much as on Mithras
Decline
Mithraism declined rapidly in the 4th century under Christian pressure. Mithraea were systematically destroyed or built over with churches — the Basilica of San Clemente in Rome sits directly above a mithraeum. The cult’s exclusion of women (the only major mystery religion to do so) may have limited its social resilience compared to Christianity, which welcomed both sexes.
Primary Sources
- Plutarch, Life of Pompey 24.5 (earliest mention of Mithraic rites)
- Statius, Thebaid 1.717–720 (Mithras and the bull)
- Porphyry, De Antro Nympharum (philosophical interpretation of the cave)
- Justin Martyr, First Apology 66 (Christian comparison to Mithraic rites)
Further Reading
- Clauss, Manfred. The Roman Cult of Mithras. Trans. Richard Gordon. Edinburgh University Press, 2000.
- Ulansey, David. The Origins of the Mithraic Mysteries. Oxford University Press, 1989.
- Beck, Roger. The Religion of the Mithras Cult in the Roman Empire. Oxford University Press, 2006.
See also: Roman Pantheon · Zoroastrianism · Greek Mystery Religions
References
- ↑ Clauss, Manfred. The Roman Cult of Mithras. Trans. Richard Gordon. Edinburgh University Press, 2000.
- ↑ Ulansey, David. The Origins of the Mithraic Mysteries. Oxford University Press, 1989.
- ↑ Beck, Roger. The Religion of the Mithras Cult in the Roman Empire. Oxford University Press, 2006.
- ↑ Plutarch, Life of Pompey 24.5 (earliest mention of Mithraic rites)
- ↑ Statius, Thebaid 1.717–720 (Mithras and the bull)
- ↑ Porphyry, De Antro Nympharum (philosophical interpretation of the cave)
- ↑ Justin Martyr, First Apology 66 (Christian comparison to Mithraic rites)