The Strange Trail from Castel Gandolfo to the Vatican, Santa Prisca and the Papal Chancery
Part 5
Mithras Beneath Rome
When the archaeological evidence for the Roman mysteries of Mithras is examined carefully, one of the most striking features is not merely the imagery of the cult itself, but where some of that imagery was discovered, where other pieces eventually came to be housed, and what later Christian buildings now occupy or stand beside the sites in which Mithraic worship once took place. This does not prove that medieval popes secretly practised Mithraism, nor does the presence of a pagan object in a Vatican collection make that object Christian; those would be claims far beyond the evidence. What the evidence does establish, however, is that a remarkable concentration of Mithraic material lies physically within the later "Christian" and papal landscape of Rome, including a Mithraic Time-god discovered at the Pope’s country residence at Castel Gandolfo, an Aion statue from Ostia described as being “now in the Vatican,” Mithraic inscriptions recovered in the grounds of the Temple of Cybele in the Vatican, a Mithraic sanctuary and inscription near the Cancelleria or Papal Chancery, and important Mithraea beneath later Christian churches such as Santa Prisca and San Clemente.
These are not modern internet associations stitched together from unrelated photographs. They are stated in M. J. Vermaseren’s scholarly study Mithras, the Secret God, and the wording is important because it allows us to distinguish what is genuinely documented from what would merely be speculation.
Castel Gandolfo: A Mithraic Time-God at the Pope’s Country Residence
The most direct papal-residence connection in Vermaseren’s book is Castel Gandolfo, the historic papal country residence outside Rome. While discussing Egyptian influence upon Mithraic representations of the mysterious god of Infinite Time, Vermaseren turns to an extraordinary statue and states plainly that this influence appears in “a statue found in the Pope’s country residence at Castel Gandolfo,” where, he adds, there had once been a villa belonging to the Emperor Domitian.
Domitian’s name is itself significant in early Christian history. Eusebius, preserving an account attributed to Hegesippus, records that Domitian ordered the descendants of Jude (Judas), described as “the brother of the Lord according to the flesh,” to be brought before him. Two grandsons of Jude were interrogated about their Davidic descent, their possessions and the kingdom of Christ; after explaining that Christ’s kingdom was not an earthly or temporal kingdom, they were dismissed. These men were therefore remembered as members of the wider family or kindred of Christ. This does not mean that their interrogation took place at the villa at Castel Gandolfo—the source does not say where the questioning occurred—but it makes the association with Domitian particularly noteworthy: the ancient imperial estate beneath the later papal residence belonged to the same emperor whom early Christian tradition remembers as personally examining members of Christ’s earthly family.
The book labels the object “Fig. 50. Statue of the Time-god at Castel Gandolfo.”
This is no ordinary classical figure. Vermaseren describes a standing Chronos or Time-god with a lion’s head, four wings and four arms, an eye upon his chest, additional lion heads upon the knees and stomach, serpents climbing upward beside him, a three-headed Cerberus at his foot, and a hydra or water-serpent among the surrounding symbols.
The imagery is deeply syncretistic. Vermaseren connects features of the statue with Anubis, Sarapis, the Egyptian Aion and the so-called Pantheistic Bes, concluding that its sculptor had been profoundly influenced by Egyptian conventions and that the resulting figure was accepted by Mithraists.
The significance of this should be stated precisely. It does not mean that the papal residence was built as a Mithraic sanctuary, because the object belonged to an ancient layer of the site associated with the imperial world of Domitian. It does mean that one of the strangest surviving figures discussed in a major work on Mithraism — a lion-headed syncretistic god of Time incorporating solar, Egyptian and underworld imagery — was actually discovered at what later became the Pope’s country residence.
That fact alone deserves to be seen rather than buried in a footnote.
A Second Aion: From Ostia to the Vatican
Immediately after discussing the Castel Gandolfo statue, Vermaseren introduces another Time-god figure and writes:
“A statue of Aion from Ostia, now in the Vatican…”
This second object is equally revealing because its iconography deliberately gathers together the attributes of numerous gods. Vermaseren notes Jupiter’s thunderbolts upon the chest, two keys, Vulcan’s hammer and tongs, Mercury’s caduceus, the cock of Aesculapius and the pine-cone associated with Attis.
The purpose of the imagery, as Vermaseren understands it, was to present Aion as an increasingly universal and all-embracing divinity. He proceeds to discuss Aion as eternal life-force, cosmic power, creator and solar figure, eventually observing that Aion could be identified with Helios and that Helios was in turn identified with Mithras (not Christ).
Here again the distinction matters. The object was not found beneath the Vatican; Vermaseren says it came from Ostia and was “now in the Vatican.” Its importance is therefore different from that of the Castel Gandolfo statue. One is a Mithraic object archaeologically associated with a later papal residence, while the other is a Mithraic or Mithraic-associated Aion statue originating elsewhere but subsequently housed in the Vatican collection.
The two should not be confused, but together they make an arresting pair: two extraordinary representations of the cosmic Time-god discussed within the Mithraic tradition, one discovered at Castel Gandolfo and another later preserved in the Vatican.
The Vatican Grounds and the Temple of Cybele
There is a third Vatican connection, this time involving inscriptions rather than statues. Vermaseren discusses a married Roman couple named Kamenius and notes:
“Two inscriptions from Rome, both found in the grounds of the Temple of Cybele in the Vatican…”
One of the inscriptions was dated 19 July AD 374 and concerned Alfenius Ceionius Julianus Kamenius, who held the Mithraic offices of pater, magister and hieroceryx. Vermaseren says that Kamenius eventually became Father of Fathers, the highest Mithraic title in the hierarchy he describes.
This is archaeologically significant because the Vatican site was not empty land upon which Christianity suddenly appeared without a religious past. The Roman religious landscape there included the cult of Cybele, while Mithraic inscriptions connected with a man holding the offices of Father, master and herald were found in those grounds.
Again, the evidence must be handled accurately. The inscriptions were found in the grounds of the Temple of Cybele in the Vatican; the source does not say that a pope possessed them in his private apartments, nor does it prove any doctrinal transmission from Cybele or Mithras into Christianity.
What it demonstrates is that the later Vatican landscape physically overlays a dense pre-Christian religious world in which the mysteries of Mithras, the cult of Cybele and other Roman religions were present.
That fact becomes important whenever antiquity itself is treated as evidence of divine origin, because the soil beneath Christian Rome preserves many ancient religious traditions, not one.
The Cancelleria: A Mithraic Sanctuary Near the Papal Chancery
Another striking passage concerns the Cancelleria, the Papal Chancery. Vermaseren is discussing Mithraic initiation, during which the novice had undergone purification, fasting and abstinence, had sworn an oath, had been branded upon the hands or forehead and had taken the Father’s right hand. He then introduces:
“An important inscription, discovered in Rome on the Campus Martius near the Cancelleria, the Papal Chancery…”
The sanctuary associated with this inscription had walls painted with stars and crescent moons and was in use around the middle of the third century. Vermaseren says it had been founded by Proficentius, the pater sacrorum, or Father of the mysteries.
The inscription itself speaks of a place described as fortunate, sacred, devout and propitious, of Mithras giving inspiration to Proficentius to make and dedicate the cave, and of initiates celebrating their vows there “for eternity.”
Vermaseren then connects the inscription with the initiates who clasped the right hand, explaining that the initiate imitated Mithras’s pact with the Sun-god and confirming that these vows were understood not merely as temporary earthly obligations but as extending into eternity.
The wording here must again be preserved precisely: the Mithraic sanctuary was discovered near the Cancelleria, not inside the later Papal Chancery itself. Nevertheless, the proximity is historically fascinating, because an ancient sanctuary of Mithras with star-and-crescent decoration and an inscription composed by a “Father of the mysteries” lay in the same Roman urban environment later dominated by one of the most important institutions of papal administration.
Santa Prisca: A Mithraic Temple Beneath a Christian Basilica
If Castel Gandolfo provides the clearest papal-residence connection, Santa Prisca provides the richest concentration of Mithraic art discussed in Vermaseren’s book.
The Mithraeum lay on the Aventine beneath what became the Christian Basilica of Santa Prisca. Vermaseren explains that the site had earlier contained an imperial palazzo associated with the age of Trajan and that a Mithraic temple was later installed there under the Severan emperors, with the cult niche completed around AD 202.
The sanctuary contained a remarkable visual programme. The side walls showed eminent initiates, especially members of the Lion grade; niches held the torch-bearers; Mithras appeared as the bull-slayer in the main cult niche; later renovations produced more elaborate frescoes showing processions of Lions bringing offerings; the seven grades of initiation were preserved in procession; and a magnificent representation of the sacred meal of Sol and Mithras was added to the left wall.
The central cult image was then expanded with an imposing reclining Oceanus-Caelus, while the group surrounding Mithras came to include Sarapis, Venus, Mars and other gods, apparently connected with the planetary world of the cult.
That collection is extraordinary by itself, because within one Roman Mithraeum we encounter Mithras, Sol, planetary gods, Venus, the Egyptian Sarapis, initiatory grades and sacrificial imagery.
Sarapis, Venus, Mars and Mithras
When the site was excavated, archaeologists discovered exceptionally rare stucco panels representing the heads of:
Sarapis, Venus, Mars and another Mithras.
Vermaseren stresses their rarity and describes the elaborate conservation necessary after their discovery.
The Sarapis head is especially significant because Vermaseren explicitly says that Sarapis, an Egyptian deity often mentioned alongside Isis, had been adopted by Mithraic worshippers.
The presence of Venus is equally important because Venus was not simply an incidental classical goddess at Santa Prisca. She was directly linked with one of the Mithraic grades.
The Bride of Mithras and Venus
The second Mithraic grade was the Nymphus, or Bride. Vermaseren says that on the Santa Prisca mural the Nymphus is shown wearing a bridal veil and is explicitly placed:
“under the protection of the planet Venus.”
He further states that this male Bride is:
“joined to Mithras in a mystical marriage by the Father.”
The following discussion makes the symbolism still more explicit. Vermaseren compares the unveiling ceremony with a rite known from the cult of Isis, calls the Nymphus’s diadem “a clear allusion to Venus,” and describes the lamp as representing the “new light” flowing from a closer relationship with the Sun-god Mithras.
This means that when the surviving Venus artwork from Santa Prisca is shown, it should not simply be captioned “a pagan goddess found in a Mithraeum.” Venus is structurally connected with the Mithraic initiation system itself through the grade of the Bride.
Sol at Santa Prisca
Sol is even more prominent. Vermaseren’s illustration list identifies both a lead plaque of Sol and a marble inlay of Sol from the Santa Prisca Mithraeum.
The sixth Mithraic grade, Heliodromus or Courier of the Sun, was explicitly conceived as the earthly deputy of Helios-Sol, and at Santa Prisca his attributes included the globe, nimbus and radiate halo. Elsewhere in the sanctuary he is portrayed as part of the mystical community.
Sol therefore does not appear merely as a decorative heavenly body. He belongs to the theology, initiation structure and sacred meal of the cult.
The Sacred Meal of Mithras and Sol
The most provocative artwork at Santa Prisca is undoubtedly the representation of the sacred meal of Mithras and Sol.
Vermaseren says that when Christians eventually destroyed the sanctuary, particular attention was directed toward this image, which he describes as:
“the sacred meal of Mithras and Sol with its affinities to the Eucharist.”
That phrase is Vermaseren’s, not a modern polemical invention.
Elsewhere, while describing the procession approaching the sacred meal, he makes another remarkable statement:
“Here bread and wine replace the flesh and blood of the bull.”
He dates the paintings to approximately AD 220 and treats them as unusually valuable evidence for Mithraic ceremonial practice.
The obvious temptation is to leap immediately to a claim that the Christian Eucharist therefore came from Mithraism, but that conclusion would outrun the evidence. Religious meals involving bread and wine can arise independently, and Christian Eucharistic traditions are documented from the first century.
What cannot reasonably be dismissed, however, is that one of the principal scholarly authorities on Mithraic archaeology himself perceived “affinities to the Eucharist” in the sacred meal of Mithras and Sol.
That is worth showing exactly as the source presents it.
The Mithraic Sacrifice Painting at Santa Prisca
The right-hand wall contained another extraordinary painting representing the suovetaurilia, the Roman state sacrifice of a bull, ram and pig. Vermaseren describes initiates participating in the procession and emphasizes that this was the only known third-century painting of the subject and that its appearance within Mithraism was unique.
The sanctuary therefore united several forms of religious imagery: the bull-slaying of Mithras, the sacred meal of Mithras and Sol, the seven initiatory grades, the planetary hierarchy, the Bride under Venus, processions of Lions bringing offerings and a representation of formal sacrifice.
When these works are shown together, Santa Prisca ceases to appear as an obscure archaeological curiosity and begins to reveal the complexity of Roman mystery religion at precisely the location upon which a Christian basilica would later stand.
The Lion Painting
Vermaseren’s own plates reproduce a surviving image captioned:
“Lion; painting in the Mithraeum under the Church of Santa Prisca in Rome.”
The Lion grade occupied a privileged position within Mithraic initiation. Vermaseren describes Lions bearing offerings in procession, participating in rites of purification and being associated with fire symbolism. At Santa Prisca one particular Lion, clothed in scarlet, is described in unusually vivid terms as having been immortalized by the painter.
The surviving paintings therefore give faces and bodies to a mystery system that could otherwise be dismissed as abstract speculation.
Christian Destruction and the Basilica Above
The end of the Santa Prisca sanctuary is itself historically revealing. Vermaseren says that Christians entered the Mithraeum and destroyed its fittings and paintings, particularly attacking the Mithraic images as those of a hated rival religion. He says the frescoes were hacked with axes and that the sacred rooms were filled with refuse before the Basilica Sanctae Priscae was erected over the ruins.
Whatever one thinks about the theological relationship between Mithraism and Christianity, that passage shows that late antique Christians themselves did not regard Mithras as merely harmless classical decoration. They saw the cult as demonic religious competition and deliberately destroyed its images.
This is also why the surviving fragments matter so greatly.
San Clemente: Sol Invictus Beneath Another Christian Church
Santa Prisca was not an isolated case.
Vermaseren also discusses the Mithraeum beneath San Clemente in Rome, describing a sanctuary deep below ground in rooms connected with an important Roman house. Near the entrance was a small hall containing seven niches, and paintings were also discovered there.
More strikingly, Vermaseren refers to a dedication by a Father in the San Clemente Mithraeum carrying the sun-wheel and palm-frond, which he identifies as symbols of Sol Invictus, the invincible Sun-god.
So beneath another later Christian church lies evidence of a Mithraic sanctuary containing precisely the solar symbolism which was central to the mysteries.
Vermaseren also names San Martino ai Monti among Roman sites where Mithraea were installed in parts of existing houses.
The significance here is archaeological rather than conspiratorial. Christianity in Rome did not arise upon vacant ground. Churches were built in a city whose older religious structures remained physically beneath them, sometimes literally beneath their floors.
The Vatican’s Nozze Aldobrandini: A Necessary Distinction
One Vatican artwork mentioned by Vermaseren must be treated differently, because it is important precisely not to mislabel it.
When discussing the initiation of the Nymphus or Bride, Vermaseren compares Mithraic purification and bridal imagery with:
“the painting in the Vatican called the ‘Nozze Aldobrandini’.”
He uses the painting as a comparative example of Roman wedding or purification imagery.
The Nozze Aldobrandini is not itself presented by Vermaseren as Mithraic art.
That distinction belongs in any serious presentation because the documented connections are already sufficiently remarkable without falsely absorbing every comparative Roman artwork into Mithraism.
What These Objects Actually Establish
Taken together, the objects and sites create an extraordinary archaeological map.
At Castel Gandolfo, the later Pope’s country residence, a lion-headed Mithraic Time-god was discovered, covered in solar, Egyptian, animal and underworld symbolism.
In the Vatican collection, Vermaseren records another Aion statue from Ostia, loaded with the attributes of numerous gods.
In the grounds of the Temple of Cybele in the Vatican, inscriptions were recovered connected with a Mithraic pater, magister and eventual Father of Fathers.
Near the Cancelleria, the Papal Chancery, an ancient Mithraic sanctuary was associated with star-and-crescent wall decoration and an inscription composed by a pater sacrorum, a Father of the mysteries, whose initiates celebrated vows intended for eternity.
Beneath Santa Prisca, archaeologists found the remains of an elaborate Mithraic world containing Mithras, Sol, Venus, Mars, Sarapis, the seven initiatory grades, mystical marriage, sacrifice, processions, planetary symbolism and the sacred meal of Mithras and Sol which Vermaseren himself described as having “affinities to the Eucharist.”
Beneath San Clemente was another Mithraeum, including evidence connected with Sol Invictus.
None of this proves that the papacy was Mithraic, and none of it proves that Christianity itself was created from the mysteries of Mithras. Such conclusions would require a historical chain of transmission that the archaeological evidence alone does not provide.
What it does prove is something that deserves far more attention: the later Christian and papal landscape of Rome sits physically amid, above and around an extraordinarily rich pre-Christian religious world whose surviving imagery includes sacred Fathers, mystery initiation, planetary grades, Sol, Venus, Egyptian deities, sacred meals, sacrifice, religious marking and cosmic gods of Time.
That matters enormously whenever the argument for a later Christian doctrine is simply that it is “ancient.”
Ancient Rome contained many ancient religions.
The soil beneath its churches proves that.
Therefore antiquity cannot by itself establish apostolicity, and proximity cannot establish continuity; what these discoveries can do is force us to distinguish archaeological fact from theological assertion and to ask much harder questions about which practices can actually be traced to Christ and the apostles and which belong to the wider religious world through which Christianity eventually moved.
One Goddess, Many Names: Isis, Venus, Cybele and the Blood of Babylon
There is a passage in Apuleius, Metamorphoses (The Golden Ass), Book XI.5, that deserves to be read very slowly. When Isis appears to Lucius, she does not present herself merely as one Egyptian goddess among many. She announces herself as the universal divine power behind the different goddesses worshipped throughout the ancient world. In the Latin she calls herself saeculorum progenies initialis—variously translated as the “primordial offspring of time,” “first-born of the ages,” or “first-born in this realm of time.” She then declares that the whole world worships her one divinity under different forms, rites and names. Among those names she specifically includes the Pessinuntian Mother of the Gods, that is, the Phrygian Cybele, and Paphian Venus; she continues with Diana, Proserpine, Ceres, Juno, Bellona, Hecate and others, before declaring that the Egyptians know her by her “true name,” Queen Isis. (Perseus Digital Library)
This must be stated accurately. Apuleius does not say that Isis is literally the daughter of Kronos. His phrase concerns her primordial relation to the ages/time. Kronos/Chronos belongs to a related but separate strand of our investigation, because Vermaseren later discusses the Mithraic Time-god through the interconnected figures of Chronos, Kronos, Saturn and Aion. We do not need to force Apuleius to say something he did not say. His actual statement is extraordinary enough: one goddess, one divinity, worshipped throughout the world under many names—and among those names are Venus and the Mother of the Gods, Cybele.
And Cybele does not remain safely somewhere in distant Phrygia.
Rome formally received the Magna Mater, the Great Mother identified with Cybele, from Pessinus in 204 BC, and her great state temple was established upon the Palatine Hill, where it was dedicated in 191 BC. (Penelope) But the Palatine must not be confused with the Vatican, because there was another sanctuary of Magna Mater in the Vatican area itself. Ancient topographical evidence identifies a shrine in Vaticano, probably the Phrygianum, on the right bank of the Tiber near the Vatican. Even more remarkable, most of the surviving inscribed altars associated with that sanctuary were discovered beneath the façade of St Peter’s during building work in 1609. (Penelope)
So the archaeological picture is more striking than saying vaguely that “Cybele was on the Palatine.” She had her great temple on the Palatine, while a separate sanctuary of the same Phrygian Great Mother stood in the Vatican district, with cult inscriptions later recovered beneath the very area of St Peter’s.
Apuleius has already told us how an initiate of Isis could understand this religious world: the many goddesses were manifestations of one supreme female divinity. The Phrygians called her the Mother of the Gods; the Cypriots called her Venus; the Egyptians called her Isis. This does not prove that every ancient worshipper consciously believed Isis, Cybele and Venus were identical in precisely the same theological sense, but it proves that such an explicit syncretistic identification was being proclaimed in Roman literature by the second century.
Then Vermaseren’s evidence becomes darker.
His Mithras, the Secret God contains an entire chapter entitled simply “Human Sacrifice.” He begins with traditions of Persians burying human victims alive and then asks whether such practices might have survived within Mithraic religion. He records the ancient accusation that the emperor Commodus polluted the Mithraic mysteries with an actual murder, a later allegation of killings during mystery celebrations, and archaeological finds that raised disturbing questions. At Saarburg, for example, the skeleton of a man was discovered face down in a Mithraeum, his wrists bound behind his back with an iron chain, prompting Vermaseren himself to ask whether he might have been the victim of ritual murder.
The evidence must again be handled honestly. Vermaseren does not conclude that human sacrifice was an established normal rite of Roman Mithraism. Indeed, he warns that accusations of human sacrifice were a standard weapon used against religious rivals, and he offers alternative explanations for some of the archaeological discoveries. Nevertheless, he also observes that the reported Mithraic simulation of murder “may be a relic of ritual human sacrifice” from an earlier eastern form of the cult. He therefore considered the evidence serious enough to devote an entire chapter to the question rather than dismissing it as fantasy.
And here the language of Revelation becomes difficult to read without feeling the force of the contrast.
John is shown a woman arrayed in splendour, associated with kings and nations, called:
“MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.”— Revelation 17:5, KJV
Then comes the horrifying description:
“I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus.”— Revelation 17:6, KJV
And Babylon’s indictment returns at the end:
“And in her was found the blood of prophets, and of saints, and of all that were slain upon the earth.”— Revelation 18:24, KJV
This does not permit us simply to write an equation—Isis = Cybele = Mithras = Rome = Revelation’s Babylon—as though archaeology had supplied a mathematical proof. Scripture itself must determine the identity of prophetic Babylon. But neither should the historical setting be sterilised until Revelation loses all of its force. John wrote within an empire whose religious world could proclaim one goddess beneath many names, including Isis, Venus and the Phrygian Mother of the Gods; whose capital housed the state sanctuary of Cybele upon the Palatine; whose Vatican district contained another sanctuary of the Great Mother; and whose mystery religions could employ frightening initiatory symbolism serious enough for Vermaseren to devote a chapter to the possibility of human sacrifice.
The prophetic woman is not merely idolatrous. She is a mother. She is a mystery. She is associated with kings. She intoxicates nations. And she is drunk with blood.
That is why the ancient material matters. It is not being introduced to manufacture Revelation’s prophecy after the fact. It shows the kind of religious vocabulary, maternal goddess imagery, syncretism, mystery initiation, imperial power and blood imagery that actually existed in the Roman world into which Revelation was given.
And perhaps the most chilling testimony does not come from a Christian polemicist at all. It comes from the pagan initiate Apuleius, placing these words upon the lips of Isis herself: the world worships her one divinity under many forms, many rites and many names. (Perseus Digital Library)
One of those names was Venus, the Roman counterpart of the planet-goddess tradition that reaches back through Astarte and Ishtar/Inanna, the great Mesopotamian (Babylon) goddess associated with the planet Venus and celebrated in ancient texts with titles including “Queen of Heaven.” Another was the Mother of the Gods—Cybele. The names changed across lands and languages, but the old pattern endured: a supreme heavenly female figure, linked with fertility, sovereignty, kingship and the star of Venus, worshipped under different forms. And centuries later, when builders opened the ground around St Peter’s, the stones of that Great Mother’s Vatican sanctuary were still there beneath them.
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