Painting: Perugino, Christ Giving the Keys of the Kingdom to St. Peter, Sistine Chapel, 1481–83, fresco, 330.1 x 548.64 cm (Vatican, Rome)
The single most contested question among the Church Fathers was what exactly Jesus meant when He said “upon this rock I will build my Church” (Matthew 16:18). The Fathers did not speak with one voice here — and the disagreement itself tells us something important.
Augustine, the most influential Western Father, argued repeatedly that the rock was Christ Himself, not Peter. In his sermons he writes: “Upon this Rock which thou hast confessed, upon this Rock which thou hast acknowledged, saying, ‘Thou art the Christ, the Son of the living God,’ will I build My Church… I will build thee upon Myself, not Myself upon thee” . He clarifies that Peter is called Petra (rock) derivatively — from Christ the true Rock — just as Christians are named from Christ, not the other way around.
Origen goes even further. He argues that every disciple of Christ becomes a “rock” — the power in Matthew 16 is not restricted to Peter alone: “But if you suppose that upon one Peter only the whole church is built by God, what would you say about John the son of thunder or each one of the Apostles?” . He insists the gates of Hades will not prevail against any of the perfect disciples.
A remarkable statistical detail survives: the scholar Launoi counted only seventeen Fathers (through the twelfth century) who understood Peter himself to be the rock, versus forty who held the opposite opinion . This is a striking data point — the majority patristic interpretation, for over a millennium, was that “the rock” was Peter’s confession of faith, not Peter’s person.
What Was Given to Peter — and What Was Given to All
This is where the picture becomes most nuanced. The Fathers universally acknowledged that Peter received something first — but they sharply disagreed about whether this made him superior in authority.
Cyprian (third century) gives the most sophisticated treatment. His view, as summarized in the Schaff apparatus: Peter received the grant alone first, but all the apostles received precisely the same power. Peter had a primacy of honor but “in no respect any power or authority over his brethren” . The episcopate is one undivided reality — and each bishop, in his own see, possesses the whole of it. The grant to Peter was meant to dramatize unity, not hierarchy. As the Schaff editor puts it, Cyprian’s system and the later Roman system are “as contrary as darkness and light” .
Augustine picks up the same thread. In a fascinating passage, he uses Paul’s rebuke of Peter at Antioch (Galatians 2) to argue that Peter could be corrected — even by someone “late and newly come” to the apostolate. He quotes Cyprian approvingly: “For neither did Peter, whom the Lord chose first, and on whom He built His Church, when Paul afterwards disputed with him about circumcision, claim or assume anything insolently and arrogantly to himself, so as to say that he held the primacy” . If Peter could be corrected, the primacy was not a license to override others.
Leo the Great (fifth century) represents the opposing trajectory. He writes that “it was given to one to take the lead of the rest” and that the care of the universal Church should “converge towards Peter’s one seat” . This is the view that would later develop into full papal supremacy — but notice how Leo argues: he derives hierarchical order among bishops from the model of Peter’s distinction among the apostles. For Leo, the distinction among the apostles was a distinction of power, not merely honor.
How the Early Church Treated Peter: The Documentary Evidence
The evidence from Eusebius’s Ecclesiastical History is particularly revealing. He cites Clement of Alexandria (late second century) reporting that Peter, James, and John — though “pre-eminently honoured by the Lord” after the ascension — did not contend for glory but instead chose James the Just as bishop of Jerusalem . This is a remarkable piece of data: the three “pillar” apostles, the ones who witnessed the Transfiguration, voluntarily subordinated themselves to James’s leadership in Jerusalem.
The Pseudo-Clementine literature (an early Christian novel) puts Peter in the most exalted terms: “set apart to be the foundation of the Church… by Jesus Himself, with His truthful mouth, named Peter, the first-fruits of our Lord, the first of the apostles” . But even here, when Peter is about to die, he ordains Clement as his successor in the teacher’s chair — not by claiming supreme authority for himself, but by the laying on of hands in the presence of the brethren.
Tertullian’s Prescription Against Heretics treats all apostolic sees as equal in principle. Rome’s authority in his view derived not from Peter’s unique commission but from the practical fact that it was a source of apostolic tradition for the African churches — a primacy of reception, not jurisdiction .
The Pattern That Emerges
What the evidence shows is a distinct developmental arc:
- First and second centuries: Peter is the first witness, the first to confess Christ, the first to receive the keys. But there is no evidence of a jurisdictional primacy. The Council of Jerusalem (Acts 15) is presided over by James, not Peter. Paul resists Peter to his face. The apostolic college acts collectively.
- Third century (Cyprian, Tertullian, Origen): A sophisticated theology emerges: Peter is the type of the Church’s unity. His primacy is exemplary — he shows that the episcopate is one and undivided. But each bishop holds the whole of that episcopate in his own see. Cyprian treats the Bishop of Rome as a colleague, not a superior.
- Fourth-fifth centuries (Augustine, Leo): Augustine still holds the “rock = Christ” interpretation but acknowledges Peter’s personal primacy among the apostles. Leo begins the move toward what would become papal ideology, though he still addresses Eastern patriarchs as equals.
- The interpolation problem: The textual evidence is itself contested. The Schaff apparatus documents that Cyprian’s key text on unity was interpolated — later scribes added phrases like “primatus Petro datur” and “cathedram Petri” to make his text support papal supremacy . The “pure” Cyprian says something quite different.
What’s Missing
The documents reveal a striking gap: there is no early patristic text (first three centuries) that clearly articulates what later becomes the standard Roman Catholic position — that Peter had jurisdictional supremacy over the other apostles and that this authority passed to the Bishop of Rome by divine right. The early Fathers speak of Peter’s honor, his priority in order, his role as a symbol of unity — but when asked about authority over other apostles, they point to Paul’s rebuke, to James’s presidency in Jerusalem, and to the equal power given to all the apostles.
The documents also contain a fascinating tension: Pope Gregory the Great (sixth century) explicitly rejected the title “Universal Bishop” and wrote to the patriarchs of Alexandria and Antioch that the three Petrine sees (Rome, Alexandria, Antioch) shared equally in Peter’s authority . This is the same Gregory whose mission to England looms so large in church history — and he refused a title his later successors would claim as essential.
Dig Deeper:
- “Augustine says the rock is Christ, Origen says it’s every perfect disciple, Leo says it’s Peter’s seat — how did this interpretation shift across the centuries and what drove the change?”
- “Cyprian believed each bishop possessed the full episcopate in his own see, yet later popes claimed universal jurisdiction — what specific historical events or documents mark the turning point from one model to the other?”
- “The Pseudo-Clementine literature presents Peter ordaining Clement as his successor while he’s still alive, and Linus and Cletus served as coadjutors during Peter’s lifetime — what does this pattern of shared rather than singular leadership suggest about how the early church understood apostolic succession?”
Branch from here
You
“Augustine says the rock is Christ, Origen says it’s every perfect disciple, Leo says it’s Peter’s seat — how did this interpretation shift across the centuries and what drove the change?”
Webb
Let me dig into this question by searching across the patristic corpus for the historical forces that drove this interpretive shift.Steps7 completed
I have enough evidence from the research results. Let me synthesize all of this.
The Great Shift: How “Peter the Rock” Became “Rome the Rock”
The patristic evidence reveals a clear trajectory — one driven less by theological development than by political crisis, imperial geography, and institutional ambition. Here’s how it unfolded across the centuries.
Phase 1: No Single Interpretation (100–300 AD)
In the earliest centuries, there simply wasn’t a settled interpretation of Matthew 16:18. The Fathers read it in multiple, contradictory ways:
The “Rock = Christ” school — This was the dominant view. It took Christ Himself — or Peter’s confession of Christ — to be the rock. Tertullian, the earliest Latin Father on this question, connects Peter’s name to Christ being “a stone of stumbling and a rock of offence” . Augustine would later solidify this into his definitive position: “I will build thee upon Myself, not Myself upon thee” .
The “Rock = every faithful disciple” school — Origen pushed this furthest, arguing that anyone who imitates Christ becomes a Peter. He explicitly asks: “If you suppose that upon one Peter only the whole church is built by God, what would you say about John the son of thunder or each one of the Apostles?” . For Origen, the “gates of hell” passage applies to all the perfect, not just one man.
The “Rock = Peter personally” school — This existed but was a minority view. Tertullian sometimes calls Peter “rock” in a rhetorical sense, but the Schaff apparatus notes the crucial distinction: when the Fathers call Peter a rock, it is “rhetorically, not dogmatically” — and the primacy they granted Peter was wholly personal, not transferable to any see .
The statistic from Launoy (cited in the Schaff apparatus) is devastating: counting all Fathers through the twelfth century, only seventeen understood Peter himself to be the rock, while forty held the opposite opinion . The majority patristic tradition did not read Matthew 16 as establishing a Petrine office.
Phase 2: The Cyprianic Synthesis — Primacy of Honor, Not Jurisdiction (250–350 AD)
Cyprian of Carthage represents the most developed third-century view. He argued that:
- Peter received the keys first, but all the apostles received precisely the same power.
- Peter’s role was to demonstrate the unity of the episcopate — one chair, one church — but every bishop, in his own see, possessed the whole of that episcopate.
- When Cyprian clashed with Pope Stephen over rebaptism of heretics, he treated Stephen as a colleague in error, not a superior to be obeyed. His surviving letters are scathing — he accuses Stephen of “betraying and deserting unity” and of introducing “many other rocks” by recognizing heretical baptism .
The Schaff apparatus makes a crucial note: Cyprian’s treatise De Unitate was later interpolated by Roman scribes who inserted phrases like “primatus Petro datur” (“primacy is given to Peter”) and “cathedram Petri” (“the chair of Peter”) to make him support papal supremacy. The “pure” Cyprian says something quite different .
Phase 3: The Crucial Driver — Constantinople Rises, Rome Needs a New Argument (381–451 AD)
Here is the precise historical force that drove the interpretive shift. It was not theological. It was geopolitical.
Council of Constantinople (381), Canon 3: The bishops declared that “the Bishop of Constantinople shall have the primacy of honor after the Bishop of Rome, because Constantinople is New Rome.” Note the reasoning — it was purely political: the city was the new imperial capital . This canon placed Constantinople ahead of Alexandria and Antioch, both of which were ancient apostolic sees founded by Peter and other apostles.
The response from Rome was immediate and furious. Pope Leo I later declared this canon “never notified to Rome” and refused to accept it . The Gratian Decretum later noted: “This canon is of the number of those which the Apostolic See of Rome did not at first nor for long years afterwards receive” .
Why this matters: Before 381, the Bishop of Rome could claim primacy because Rome was the imperial capital. After 381, Constantinople had the same claim by the same reasoning. The political ground for primacy was cut out from under Rome. This is what forced the Roman bishops to shift their argument from imperial geography to Petrine succession.
Council of Chalcedon (451), Canon 28 doubled down: it confirmed Constantinople’s second-rank status, explicitly stating that “the Fathers gave the primacy to the see of Old Rome because she was the imperial city” — and that equal privileges belonged to New Rome by the same logic . The Petrine idea is “never once mentioned” in the canon’s reasoning .
Phase 4: Leo the Great — The Architect of the Petrine Claim (440–461 AD)
Leo I is the pivotal figure. Before him, the Petrine interpretation of Matthew 16 existed but was one view among others. After him, it became the official Roman position. The evidence shows exactly what drove this:
The political vacuum in the West: After the barbarian invasions, Rome was the only functioning imperial authority in the West. Leo stepped into that vacuum. As the Schaff apparatus notes, “the diminution of the political importance of Rome… led the Bishops of Rome to build up their ecclesiastical importance on the scriptural claims of St. Peter” .
The Tome of Leo (449): Leo’s famous doctrinal letter to Flavian became the standard of orthodoxy at Chalcedon. This gave him immense prestige. But Leo leveraged this into a jurisdictional claim. He wrote that the universal Church “has become a rock through the building up of that original Rock” — a sophisticated identification of Peter with the Church itself, but inevitably with his own see . In a letter to Anastasius of Thessalonica, he states flatly: “Petro totius ecclesiae cura et principatus commissa est” — the care and principality of the whole Church was committed to Peter .
The crucial step: Leo also obtained the Edict of Valentinian III (445), which made the Bishop of Rome the supreme authority in the Western Church. This edict explicitly based its claims not on the imperial character of Rome but “on the supposed primacy of St. Peter” . This was a novelty — the first time a civil law grounded Roman ecclesiastical authority in Petrine succession rather than imperial geography.
The critical gap: Even Leo’s legates at Chalcedon acknowledged that Constantinople held the second place. When the council protested that Flavian had been given only the fifth seat at the Latrocinium, Leo’s own legate Paschasinus responded: “We will, please God, recognize the present bishop Anatolius of Constantinople as the first [i.e. after us]” . This is Leo’s representative conceding the very point Leo himself was fighting. The East never submitted to Leo’s Petrine claims.
Phase 5: Gregory the Great — The Reluctant Traditionalist (590–604 AD)
The fascinating coda comes with Gregory the Great, who represents a rearguard action against the full-blown Petrine claim. When the Patriarch of Constantinople, John the Faster, assumed the title “Universal Bishop,” Gregory erupted:
“Who is this that, against the evangelical ordinances, against the decrees of canons, presumes to usurp to himself a new name? … If he be named Universal, above the holy Roman Church which has a prior rank, which is the head of all the Churches of God, it is certain that he shews himself as a rebel against the holy Councils, and a heretic” .
But here is the revealing part: Gregory himself refused the same title. He called it “a name of vanity” and “of intolerable pride.” He wrote to Eulogius of Alexandria and Anastasius of Antioch that the three Petrine sees (Rome, Alexandria, Antioch) shared equally in Peter’s authority . He even argued that anyone who accepted the title “Universal Bishop” was “estranged from the orthodox Faith” .
Yet Gregory also did believe in a Petrine primacy of sorts — he says elsewhere that “the care and principality of the whole Church was committed to Peter” — but in practice he treated Eastern patriarchs as equals and never attempted to exercise coercive jurisdiction over them .
Phase 6: The Forgeries That Changed Everything (9th Century)
The Schaff apparatus identifies the final turning point: Pope Nicholas I (858–867) used the False Decretals — a set of forged documents that claimed ancient popes had exercised universal jurisdiction — to transform what had been a claim into a system of canon law. The apparatus states bluntly: Nicholas “trampled on the Nicene Constitutions, and made the false decretals the canon law of the Western churches” . He was “the first ‘Pope’ who answers to the Tridentine definitions” .
This is why the same apparatus insists that the early bishops of Rome should properly be called “simply bishops” from Linus to Sylvester, “patriarchs” under the Nicene Constitution from Sylvester to Nicholas I, and only “Popes” (in the modern sense) after Nicholas I .
The Pattern in Summary
| Century | Interpretation of “the Rock” | What Drove It |
|---|---|---|
| 2nd–3rd | Christ, or Peter’s confession, or every faithful disciple | No political pressure yet; multiple interpretations co-exist |
| 3rd (Cyprian) | Peter as symbol of unity; no jurisdictional primacy | Need to combat heresy and schism without centralizing authority |
| 381 | Canon 3 gives Constantinople #2 — politically | Constantinople becomes imperial capital; Rome loses its political monopoly |
| 5th (Leo) | Shift: Peter = the rock; Rome = Peter’s seat | Constantinople’s rise + barbarian invasions + Leo’s personal prestige; Rome needs a new foundation for its claim |
| 6th (Gregory) | Ambivalent — affirms Petrine primacy but rejects universal jurisdiction | Still feels bound to older conciliar tradition; Eastern churches still independent |
| 9th (Nicholas I) | Full claim: Roman supremacy by divine right | False Decretals provide legal foundation; Carolingian empire weakens, papacy fills power vacuum |
What’s Striking
The documents tell a story that is almost the opposite of what later Catholic tradition asserted. The early Church did not interpret Matthew 16 as instituting a Petrine office that passed to Rome. That interpretation emerged reactively — as a response to Constantinople’s political rise and the collapse of Roman imperial authority in the West. Leo I was a theological genius who leveraged the Tome’s success at Chalcedon to press a jurisdictional claim that had no precedent in earlier patristic tradition. And even then, the East never accepted it.
The real engine of change was Constantinople’s elevation in 381. Before that, Rome’s primacy was unchallenged and needed no Petrine justification. After that, it needed one — and Leo provided it. The interpretation of Matthew 16 shifted because the political ground shifted under Rome’s feet.
Dig Deeper:
- “Leo’s Tome was acclaimed at Chalcedon as the standard of orthodoxy, yet the council simultaneously enacted Canon 28 which subordinated Rome’s claim to imperial geography — how did Leo reconcile acclamation for his theology with rejection of his jurisdictional claim, and what does his correspondence with the Empress Pulcheria reveal about the political maneuvering?”
- “The sixth canon of Nicaea in 325 mentioned the ‘ancient customs’ of Alexandria and Rome without any reference to Peter — what did the Fathers at Nicaea actually understand the basis of Roman primacy to be, and how was this canon later reinterpreted to support Petrine claims?”
- “Gregory the Great condemned the title ‘Universal Bishop’ as heretical and anti-Christian when John the Faster used it, yet later popes claimed precisely that title — what specific political shifts between Gregory’s death in 604 and the coronation of Charlemagne in 800 made this previously heretical claim acceptable?”
What the Documents Actually Say
Let’s walk through each major Father with their actual words, not secondary claims about them.
Tertullian (c. 155–220 AD) — The “Rock = Peter” Already Seen as a Problem
Tertullian gives us the earliest Latin treatment of Matthew 16. Writing against the heretic Marcion, he confidently refers to Peter as “the rock on which the church should be built” and notes that Peter obtained “the keys of the kingdom of heaven” with the power of “loosing and binding” . This seems straightforward enough.
But look at what happens when Tertullian writes against another opponent — the “Psychic” (i.e. non-Montanist) Christians. Suddenly his tone shifts dramatically. He accuses them of “subverting and wholly changing the manifest intention of the Lord” by claiming that the power of binding and loosing “has derived to you, that is, to every Church akin to Peter.” He insists: “On thee,” He says, ‘will I build My Church;’ and, ‘I will give to thee the keys,’ not to the Church‘ . The power was personal to Peter, he argues — so how can any church claim it by succession?
This is a remarkable move. Tertullian uses the very exclusivity of Peter’s grant to undermine any claim that the power passes through Rome. If it was personal to Peter, he says, then it doesn’t belong to any church at all. And he pivots: “In accordance with the person of Peter, it is to spiritual men that this power will correspondingly appertain, either to an apostle or else to a prophet” . The power belongs to those who have the Spirit — not to a see.
Origen (c. 184–253 AD) — Every Disciple Becomes a Peter
Origen’s treatment is the most universalizing in the patristic corpus. He explicitly rejects the restriction of the rock to Peter alone. His argument is worth reading in full:
“But if you suppose that upon that one Peter only the whole church is built by God, what would you say about John the son of thunder or each one of the Apostles? Shall we otherwise dare to say, that against Peter in particular the gates of Hades shall not prevail, but that they shall prevail against the other Apostles and the perfect?”
For Origen, every disciple of Christ who confesses the Son of the living God becomes a Peter. He writes: “For a rock is every disciple of Christ of whom those drank who drank of the spiritual rock which followed them, and upon every such rock is built every word of the church.” He concludes with breathtaking breadth: “all bear the surname of ‘rock’ who are the imitators of Christ” — and the promise of the keys is given “to every one who becomes such as that Peter was” .
The keys of the kingdom? Origen argues they were given to Peter in a special way — he received “the keys not of one heaven but of more” and binds and looses “not in one heaven but in them all” . But this makes Peter’s position one of degree, not of kind — a superabundant fullness of what every perfect disciple receives.
Cyprian of Carthage (c. 210–258 AD) — The Critical Witness
Cyprian’s position is the most nuanced and has been the most disputed. Let me quote his key passage from On the Unity of the Church (Chapter 4) in full from the document:
“The Lord speaks to Peter, saying, ‘I say unto thee, that thou art Peter; and upon this rock I will build my Church…’ And again to the same He says, after His resurrection, ‘Feed my sheep.’ And although to all the apostles, after His resurrection, He gives an equal power, and says, ‘As the Father hath sent me, even so send I you: Receive ye the Holy Ghost: Whose soever sins ye remit, they shall be remitted unto him; and whose soever sins ye retain, they shall be retained;’ yet, that He might set forth unity, He arranged by His authority the origin of that unity, as beginning from one. Assuredly the rest of the apostles were also the same as was Peter, endowed with a like partnership both of honour and power; but the beginning proceeds from unity.”
This is the famous passage. Note what Cyprian does and does not say:
- He does say Peter received the grant first — to dramatize unity
- He does say the other apostles were the same as Peter — with equal partnership of honor and power
- He does NOT say Peter had jurisdiction over them
- He does NOT say Peter’s authority passed to Rome
- He does NOT say any see is the test of unity
The Schaff editor’s note on this passage is blunt: “Here note that our author’s entire ignorance of any Centre of Unity, of any one See as the test of communion; in short, of any one bishop as having more of Peter’s authority than others, — is a sufficient disproof of the existence of any such things. Otherwise, how could they have been overlooked in a treatise devoted to the subject of unity?”
And the apparatus also notes that this text was tampered with — Roman scribes later added phrases like “primatus Petro datur” and “cathedram Petri” to make Cyprian say what he never said .
Firmilian of Cappadocia vs. Pope Stephen (c. 256 AD) — The Confrontation
The most explosive evidence comes from Firmilian’s letter to Cyprian, written during the dispute over rebaptism of heretics. Pope Stephen had broken communion with the Asian bishops for rebaptizing heretics. Firmilian’s response is searing:
“I am justly indignant at this so open and manifest folly of Stephen, that he who so boasts of the place of his episcopate, and contends that he holds the succession from Peter, on whom the foundations of the Church were laid, should introduce many other rocks and establish new buildings of many churches; maintaining that there is baptism in them by his authority.”
Firmilian accuses Stephen of being “an apostate from the communion of ecclesiastical unity” and says Stephen has “excommunicated himself alone from all” — not the other way around . He explicitly rejects Stephen’s claim to Petrine succession as a novelty, charging that Stephen has “departed from the peace and unity of the Catholic Church” .
The Schaff editor on Firmilian observes: “His letter turns upon its entire innocence of any conception that Stephen has a right to dictate; and, while it shows a dangerous tendency in the latter personally to take airs upon himself as succeeding the primate of the apostolic college, it proves not less that the Church was aware of no ground for it, but held all bishops equally responsible for unity by communion with their brethren.”
Cyprian on Paul’s Rebuke of Peter — The Equality Argument
Cyprian explicitly uses Paul’s rebuke of Peter at Antioch (Galatians 2) to argue against any Petrine supremacy. Writing against Stephen’s position, he says:
“Neither did Peter, whom first the Lord chose, and upon whom He built His Church, when Paul disputed with him afterwards about circumcision, claim anything to himself insolently, nor arrogantly assume anything; so as to say that he held the primacy, and that he ought rather to be obeyed by” others .
If Peter himself didn’t claim primacy, Cyprian asks — why should Stephen? The Schaff note observes: “But a primacy involves no supremacy. All the Gallicans, with Bossuet, insist on this point.”
Augustine (354–430 AD) — The Rock is Christ, Peter Represents the Church
Augustine’s position is consistent and clear across multiple works. In his most famous formulation, he insists on the linguistic point: Peter is named from the rock, not the rock from Peter:
“For ‘petra’ (rock) is not derived from Peter, but Peter from ‘petra’; just as Christ is not called so from the Christian, but the Christian from Christ. For on this very account the Lord said, ‘On this rock will I build my Church,’ because Peter had said, ‘Thou art the Christ, the Son of the living God.'”
The rock is Christ — or Peter’s confession of Christ. Either way, it is not Peter himself as a person.
But Augustine also says Peter represents the Church. In his Sermon on the Apostle Peter, he says: “The Church symbolized in its generality, was personified in the Apostle Peter, on account of the primacy of his apostleship… when it was said to him, ‘I will give unto thee the keys of the kingdom of heaven,’ he represented the universal Church” . The keys were given to Peter as a figure of the whole Church — not as an individual with exclusive power.
In a crucial passage on the walking on water, Augustine identifies Peter as a figure of the Church’s weakness — both strong and weak in one person: “In that one Apostle then, that is, Peter, in the order of Apostles first and chiefest, in whom the Church was figured, both sorts were to be represented, that is, both the strong and the weak; because the Church doth not exist without them both” .
John Chrysostom (c. 349–407 AD) — The Most “High” View
Chrysostom gives the most exalted language about Peter, calling him “in the order of Apostles first and chiefest” and saying Christ gave him “the keys of Heaven” and “to a mortal man He entrusted the authority over all things in Heaven” . But note the context: Chrysostom is arguing against those who “lessen the dignity of the Son” — his point is that the Son gave these gifts, proving His equality with the Father. The high Petrine language serves a trinitarian argument, not a papal one.
And crucially, Chrysostom interprets “upon this rock I will build my Church” to mean “on the faith of his confession” — not on Peter’s person .
Jerome (c. 347–420 AD) — The Surprising Admission
Jerome, writing against Jovinian, makes a remarkable concession. After noting that John was loved more than the other apostles, he anticipates an objection: “But you say, the Church was founded upon Peter.” His answer: “Although elsewhere the same is attributed to all the Apostles, and they all receive the keys of the kingdom of heaven, and the strength of the Church depends upon them all alike, yet one among the twelve is chosen so that when a head has been appointed, there may be no occasion for schism” .
This is crucial. Jerome explicitly says the same power was given to all the apostles (citing Matthew 18:18 and John 20:22-23), and that Peter’s selection was a matter of practical unity — to prevent schism — not because he had more authority by divine right.
Leo the Great (440–461 AD) — The Novel Claim
Leo represents a clear break. He writes that the Lord “has placed the principal charge on the blessed Peter, chief of all the Apostles; and from him as from the Head wishes His gifts to flow to all the body.” He warns that “any one who dares to secede from Peter’s solid rock may understand that he has no part or lot in the divine mystery” .
This is qualitatively different from what came before. Leo is the first to explicitly tie salvation itself to communion with Peter’s rock — understood as the Roman see. He also says that Peter “has not abandoned the helm of the Church” and “still to-day he more fully and effectually performs what is entrusted to him” in his successors . This is the beginning of what would become the full doctrine of papal supremacy.
But even Leo could not make the East accept it. When the Council of Chalcedon enacted Canon 28, it explicitly said: “The Fathers rightly granted privileges to the throne of old Rome, because it was the royal city. And the One Hundred and Fifty most religious Bishops, actuated by the same consideration, gave equal privileges to the most holy throne of New Rome, justly judging that the city which is honoured with the Sovereignty and the Senate… should in ecclesiastical matters also be magnified” . The Petrine argument is not even mentioned in the canon. The Schaff editor notes: “It implies a wonderful power in the rank of Old Rome, if a see is to rank next to it because it happens to be ‘New Rome.'”
What the Evidence Actually Shows
The raw data from the documents themselves tells a very different story from what I initially reported based on secondary apparatus:
- No single “majority” interpretation of Matthew 16 emerges from the early Fathers. They held a range of views — Christ as the rock, Peter’s confession as the rock, every faithful disciple as a rock, and (yes) Peter himself as a rock — often simultaneously and without apparent conflict.
- The Launoy count (17 vs. 40) is not in the primary texts I can access. I found it mentioned only in the Schaff apparatus footnotes , not in the actual patristic works. It may be based on counting a specific interpretive claim (e.g., “the rock means Peter’s person”) rather than overall views.
- The most “high” Petrine language often appears in polemical contexts where the author’s real target is something else — Chrysostom arguing for trinitarian equality, Tertullian arguing against Marcion, Jerome arguing for virginity. When the same authors write on the nature of church authority, they often moderate their claims sharply.
- The turning point is real. The difference between Cyprian (c. 256) writing to Stephen as an equal who has broken unity and Leo (c. 450) claiming that separation from Peter’s rock means damnation is not subtle. Something changed. But what drove it was not a theological discovery buried in Matthew 16 — it was the political reality that Constantinople was elevated in 381, Rome needed a new claim, and Leo brilliantly provided one.
- The gaps: I did not find any early text (first three centuries) that clearly articulates a jurisdictional Petrine supremacy passing to the Roman bishops. Cyprian comes closest, and he explicitly denies it. Firmilian explicitly rejects it. Augustine explicitly interprets the rock as Christ. Tertullian argues the power was personal to Peter and therefore not transferable. Even Jerome, the great Roman apologist, says the power belongs equally to all apostles.
Dig Deeper:
- “Firmilian explicitly accuses Stephen of ‘introducing many other rocks’ by recognizing heretical baptism — what does his argument reveal about how the concept of ‘rock’ was understood to be tied to doctrinal integrity rather than to a see, and does this same argument appear in other third-century disputes?”
- “Chrysostom uses extraordinarily high language about Peter’s authority — ‘all things in Heaven entrusted to a mortal man’ — yet interprets the rock as Peter’s confession of faith, not his person. How does his exegetical method reconcile these two positions, and does he ever apply this authority to the Roman see specifically?”
- “The Council of Chalcedon’s Canon 28 explicitly bases Roman primacy on the city being the imperial capital, not on Petrine succession — yet Leo simultaneously claimed Petrine authority. How did the Eastern bishops who approved the Tome of Leo as the standard of orthodoxy understand the relationship between Leo’s theological authority and his jurisdictional claims?”
Perugino’s Christ Giving the Keys to Peter (1481–1482) — The Sistine Chapel
There is one painting that stands above all others as the visual embodiment of the very debate we’ve been tracing: Pietro Perugino’s fresco Christ Giving the Keys to Peter, painted on the north wall of the Sistine Chapel in Vatican City, completed in 1482.
Here’s why it matters for our discussion:
The Composition as a Theological Statement
Perugino’s fresco depicts Matthew 16:19 in the foreground — Christ, standing calmly, handing a set of two golden keys to a kneeling Peter. The apostles gather around in a loose semi-circle. In the background, two subsidiary scenes unfold: the Tribute Money (left) and the Stoning of Christ (right), while the central axis of the composition rises to the great dome of the Temple of Jerusalem in the distant center.
The painting was executed as part of the original decoration of the Sistine Chapel — the very chapel where papal conclaves are held, where popes are elected. This was not a neutral choice of subject. Sixtus IV, the pope who commissioned the chapel, was consolidating papal authority after the conciliar crisis of the 15th century — the very same crisis that had seen councils try to assert supremacy over popes. The fresco was a declaration: the keys were given to Peter, and through him to Rome.
What the Painting Reveals — and What It Conceals
The painting is a masterwork of compression and emphasis. Perugino places Christ and Peter at the absolute center, with all lines converging on the moment of transfer. The keys are two — a gold key and a silver key — symbolizing the power to bind and to loose, the spiritual and temporal authority. Christ’s other hand gestures calmly toward Peter, and the apostles stand in quiet assent or conversation.
But the painting also conceals the very tensions the Fathers wrestled with. There is no Paul beside Peter. There is no James presiding over a council. There is no Origen asking what about John. The fresco freezes one moment — the giving — and erases all the others: Paul’s rebuke, the Council of Jerusalem, the apostolic college deciding collectively. In this sense, the painting does what Leo the Great did textually: it selects one strand of the tradition and presents it as the whole.
Why It’s the Right Answer to Your Question
The Sistine Chapel as a whole was, in one sense, a fresco cycle about the very controversy we’ve been examining. The north wall (Perugino’s side) features scenes from the life of Christ culminating in the giving of the keys. The south wall features scenes from the life of Moses — the old covenant. The ceiling would later receive Michelangelo’s Creation. But the organizing principle was typological: Christ as the new Moses, Peter as the new mediator, and the Pope as Peter’s successor. The entire chapel was designed to be a visual argument for what Leo had first articulated and what the False Decretals had codified.
Competing Visions in the Same Room
Giotto’s chapel in Padua from the 14th century gives a far more intimate, non-jurisdictional Peter. Masaccio’s Tribute Money (also in the Brancacci Chapel) shows Peter finding the coin in the fish’s mouth — a miracle of obedience and humility, not authority. But Perugino’s fresco was official art — state-sponsored theology in the pope’s own chapel. It represents the triumphant reading of the tradition: the one that won in the West.
The Fresco as a Witness in the Debate
What makes the fresco so valuable for our question is that it performs the very interpretive shift we traced. It takes a moment that, in the early Church, was understood in multiple ways — Origen’s “every Peter,” Cyprian’s “equal power and honor,” Augustine’s “the rock is Christ” — and fixes it as a single, clear, univocal transfer of authority. The painting doesn’t show Christ handing keys to all the apostles. It doesn’t show the confession of faith as the rock. It shows one man kneeling before Christ receiving two keys.
In that sense, Perugino’s fresco is the visual equivalent of Pope Nicholas I using the False Decretals: it takes the raw material of the tradition and monumentalizes one interpretation. The Sistine Chapel itself became the architectural and artistic claim that this interpretation was not a reading but the truth.
If you want a single work of art that exemplifies the debate — not just depicts it, but participates in it — this is the one. It is the giving of the keys as Leo the Great and his successors wanted it seen: singular, unambiguous, and located in Rome.
Dig Deeper:
- “Perugino’s fresco was painted just 30 years before Luther’s 95 Theses — how did Reformation-era artists like Dürer or Cranach depict the giving of the keys differently, and do their compositions visually contest or affirm Perugino’s reading?”
- “The Sistine Chapel places Peter receiving keys on the north wall and Moses receiving the law on the south — what does this typological pairing reveal about how late 15th-century papal ideology understood the relationship between old covenant and new, and does any patristic source make the same typological connection?”
- “Gregory the Great sent iron filings from Peter’s chains embedded in keys as healing charms — what does the material culture of ‘keys’ (as relics, as consecrated objects, as physical tokens of authority) reveal about how the Petrine claim was experienced by ordinary Christians versus how it was argued by theologians?”