Antoninus Pius (AD 138–161) is remembered as one of Rome’s “Five Good Emperors.” His reign lasted twenty-three years and was marked by peace, stability, and prosperity. He earned the title Pius because of his devotion: to his adoptive father Hadrian, whose memory he defended; to Roman religion, which he honored scrupulously; and to his family. Ancient writers portray him as the model of dutifulness and justice.
But beneath this outward calm, Christianity continued to grow. For Christians, Antoninus’ reign was not simply peaceful. It was a season of both intellectual flourishing and enduring danger. Some of the earliest apologies — reasoned defenses of Christianity addressed to emperors — come from this time, as well as one of the most famous martyrdom accounts of the ancient church.
Antoninus and His Reputation
The Historia Augusta reports:
“He was called Pius for the following reason: When the Senate wanted to annul Hadrian’s decrees, he persuaded them not to do so. He supported the father of his wife Faustina, who had been accused, and obtained his pardon. He always treated his stepmother with respect and honor. And he always sacrificed to the gods, showing reverence in every way.” (Life of Antoninus Pius, 6).
This reputation for reverence and stability carried into later Roman memory. He was remembered as a benevolent emperor who avoided war, strengthened the law, and ensured financial security.
Justin Martyr: Pleading Before the Emperors
During Antoninus’ reign, the Christian philosopher Justin Martyr composed his First Apology (c. 155), addressed to Antoninus Pius, Marcus Aurelius, Lucius Verus, and the Roman Senate. Why multiple emperors? Because Antoninus had adopted Marcus and Lucius as his heirs. By addressing all of them, Justin was not only appealing to the reigning emperor but also to those who would succeed him. He wanted Christianity to be judged fairly at the highest level of Rome.
Justin’s central plea was simple: stop condemning Christians for their name alone.
“Reason requires that those who are accused should not be condemned without a trial, nor hated on account of a name. For what is the accusation? That we are called Christians. This is no crime. The charge is only that we bear a name. If any is found guilty of evil, let him be punished as an evildoer; but not on account of the name, if he is found to be guiltless.” (First Apology 4, Loeb).
He exposed the absurdity of condemning someone merely for a title:
“For from a name neither praise nor punishment could reasonably spring, unless something excellent or base in action can be shown about it. Those who accuse us of atheism, because we do not worship the same gods as you, charge us falsely; for we worship the Maker of this universe, declaring that He has no need of streams of blood and libations and incense.” (First Apology 6, Loeb).
Justin also wanted to show that Christians lived morally upright lives:
“We who once delighted in fornication, now embrace chastity alone. We who used magical arts dedicate ourselves to the good and unbegotten God. We who loved gain above all things now bring what we have into a common stock, and share with every needy one. We who hated and destroyed one another, and on account of our different customs would not live with men of a different tribe, now, since the coming of Christ, live familiarly with them, and pray for our enemies.” (First Apology 14, Loeb).
Describing Christian Worship
Before Justin, the Roman governor Pliny the Younger had reported what former Christians told him under interrogation (ca. AD 112 under Trajan):
“They declared that the sum of their fault or error had been that they were accustomed to meet on a fixed day before dawn, and to sing responsively a hymn to Christ as to a god, and to bind themselves by an oath, not to some crime, but not to commit theft, robbery, or adultery, not to break their word, and not to refuse to return a deposit when asked for it. After this it was their custom to depart, and then to assemble again to partake of food — but ordinary and innocent food.” (Pliny, Letters 10.96, Loeb).
But Justin’s First Apology is the first time a Christian himself described worship directly to the Roman emperors. His account is fuller, and deliberately meant to explain Christian practice in detail:
“On the day called Sunday, all who live in cities or in the country gather together in one place, and the memoirs of the apostles or the writings of the prophets are read, as long as time permits. Then, when the reader has finished, the president verbally instructs, and exhorts to the imitation of these good things. Then we all rise together and pray, and, as we said before, when our prayer is ended, bread and wine and water are brought, and the president in like manner offers prayers and thanksgivings, according to his ability, and the people assent, saying Amen; and there is a distribution to each, and a sharing of that over which thanks have been given, and to those who are absent a portion is sent by the deacons.” (First Apology 67, Loeb).
And on the Eucharist:
“This food is called among us the Eucharist, of which no one is allowed to partake but the man who believes that the things which we teach are true, and who has been washed with the washing for the remission of sins, and unto regeneration, and who is so living as Christ has enjoined. For not as common bread and common drink do we receive these; but in like manner as Jesus Christ our Savior, having been made flesh by the Word of God, had both flesh and blood for our salvation, so likewise have we been taught that the food which is blessed by the prayer of His word, and from which our blood and flesh are nourished, is the flesh and blood of that Jesus who was made flesh.” (First Apology 66, Loeb).
Justin left no doubt: Christians worshiped Christ as God, and their meal was not symbolic but sacred — the body and blood of Jesus.
In his Second Apology, Justin gave examples of how Christians were still executed for the name alone:
“When a certain woman, who had been made a disciple of Christ, remained with her husband for a time and tried to persuade him to live in chastity, and when he continued in licentiousness, she left him. Then, when she was about to be married to another, her former husband accused her of being a Christian. She presented a petition to delay the case until she could arrange her affairs, but her instructor in the faith was arrested and punished merely for being called a Christian.” (Second Apology 2, Loeb).
Even under Antoninus, Christians died for their confession of Christ.
Polycarp: Faithful Unto Death
At roughly the same time, Polycarp — bishop of Smyrna and disciple of the apostle John — was brought before the Roman proconsul.
When pressed to deny Christ, he famously replied:
“Eighty-six years I have served him, and he has done me no wrong. How then can I blaspheme my King who saved me?” (Martyrdom of Polycarp 9, Loeb).
The proconsul urged him to swear by Caesar:
“Swear by the fortune of Caesar; repent, and say, Away with the atheists!’ But Polycarp, with solemn countenance, looked upon all the lawless heathen in the arena, and waving his hand toward them, groaned, and looking up to heaven, said: ‘Away with the atheists.’” (Martyrdom of Polycarp 10, Loeb).
As they bound him for the fire, he prayed:
“O Lord God Almighty, Father of Thy beloved and blessed Son Jesus Christ, by whom we have received the knowledge of Thee, the God of angels and powers and every creature, and of all the righteous who live before Thee, I bless Thee that Thou hast counted me worthy of this day and hour, that I may share, among the number of the martyrs, in the cup of Thy Christ, for resurrection to eternal life both of soul and body, in the incorruptibility of the Holy Spirit.” (Martyrdom of Polycarp 14, Loeb).
Polycarp’s death under Antoninus shows that Rome still demanded worship of Caesar — and Christians who refused still died.
The Epistle to Diognetus: Citizens of Another World
From the same period comes the anonymous Epistle to Diognetus. It begins with a fictional inquirer raising the questions that many pagans asked about Christians:
“Since I see, most excellent Diognetus, that you are exceedingly anxious to learn the religion of the Christians, and are searching into it with the most careful and exact inquiry — as to what God they trust, and how they worship Him, that they all despise the world and disregard death, and neither account the acknowledged gods of the Greeks to be gods, nor observe the superstition of the Jews; and what kind of love they have for one another, and why this new race or practice has entered into life now and not before — I welcome this zeal of yours, and I beg of God, who enables both us to speak and you to hear, that it may be granted to both of us to profit by what we learn.” (Epistle to Diognetus 1, Loeb).
After dismissing both idol worship and Jewish ritual sacrifices as unworthy of God, the author explains that Christianity did not come from human speculation, but from revelation:
“When then you have freed yourself from all these things, and laid aside the error of the common talk, and are rid of the deception of the gods, and no longer suppose, like the Jews, that God has need of sacrifices — then shall you learn what is the true mystery of the Christian faith. For neither by curiosity nor by busy inquiry have we learned it, nor did we discover it through the art of men, as in some empty talk; but it has been handed down to us from the very Word of God Himself, who was sent from heaven by God to men.” (Epistle to Diognetus 4, Loeb).
And then comes one of the most moving descriptions of the Christian life in the entire second century — a vision of paradox, resilience, and heavenly citizenship:
“For Christians are not distinguished from the rest of mankind by country or by speech or by customs. For they do not dwell somewhere in their own cities, nor do they use some different language, nor practice a peculiar kind of life. This teaching of theirs has not been discovered by the thought and reflection of inquisitive men, nor do they champion any human doctrine, as some do. But while they dwell in both Greek and barbarian cities, as each has fallen to their lot, and follow the native customs in clothing and food and the other matters of daily life, yet the condition of citizenship which they exhibit is wonderful, and admittedly strange. They live in their own countries, but only as sojourners; they share all things as citizens, and suffer all things as foreigners. Every foreign country is a fatherland to them, and every fatherland is foreign.
They marry like all other men, and they beget children; but they do not cast away their offspring. They have their meals in common, but not their wives. They are found in the flesh, yet they do not live after the flesh. They spend their days upon earth, but their citizenship is in heaven. They obey the established laws, and they surpass the laws in their own lives. They love all men, and are persecuted by all. They are not known, and yet they are condemned. They are put to death, and yet they are quickened into life. They are poor, yet make many rich; they lack all things, and yet abound in all things. They are dishonored, and yet are glorified in their dishonor. They are spoken evil of, and yet are justified. They are reviled, and bless; they are insulted, and repay the insult with honor. They do good, yet are punished as evildoers. Being punished, they rejoice as though they were thereby quickened into life. The Jews make war upon them as foreigners, and the Greeks persecute them; and those who hate them cannot state the cause of their enmity.” (Epistle to Diognetus 5–6, Loeb).
This is how Christians under Antoninus saw themselves: rooted in Roman cities, yet belonging to another world; hated and persecuted, yet bringing life to others; dishonored, yet glorified; punished, yet rejoicing.
Hegesippus: Guarding the Apostolic Tradition
During Antoninus’ reign, the writer Hegesippus began preserving Christian memory in his five books of Memoirs. Sadly the work is lost, but fragments survive in Eusebius:
- On the uniformity of doctrine:
“And the Church of Corinth continued in the true faith until Primus was bishop in Corinth; and I conversed with them on my voyage to Rome, and we were refreshed together in the true doctrine. And being in Rome I made a succession up to Anicetus, whose deacon was Eleutherus. And after Anicetus, Soter succeeded, and after him Eleutherus. In every succession and in every city things are as the Law and the Prophets and the Lord proclaim.” (Hist. Eccl. 4.22.1–3, Loeb).
- On the family of Jesus (“desposyni”):
“There still survived of the kindred of the Lord the grandsons of Jude, who had been called his brother according to the flesh. … Domitian asked them how much property they owned; they said they had only thirty-nine plethra of land, and showed their calloused hands from farming. Asked about Christ and his kingdom, they replied that it was not earthly but heavenly and angelic, to appear at the end of the world. At this Domitian let them go, and they became leaders of the churches, both as witnesses and as of the Lord’s family.” (Hist. Eccl. 3.19–20, Loeb).
- On James the Just:
“James, the brother of the Lord, succeeded to the government of the Church in conjunction with the apostles. … His knees became hard like a camel’s because of his constant worship, kneeling and asking forgiveness for the people. … They threw him down from the temple, stoned him, and finally a fuller’s club struck his head. Thus he bore witness, and they buried him by the temple, and his monument still remains.” (Hist. Eccl. 2.23, Loeb, citing Hegesippus).
- On heresies after the apostles:
“Until the times of Trajan the Church continued a pure and uncorrupted virgin. But when the sacred band of apostles had closed their lives, and that generation passed away, then the conspiracy of godless error arose through the fraud of false teachers.” (Hist. Eccl. 4.22.4–7, Loeb).
Hegesippus stands as one of the earliest church historians, traveling through cities, checking successions of bishops, and insisting on continuity with the apostles.
The Rescript of Antoninus — and Why It Fails
Eusebius also preserves a decree attributed to Antoninus, which seems to restrain mob violence against Christians:
“If, therefore, the provincials are able to make a clear case against the Christians in court, let them bring charges. But it is unlawful to persecute them merely for the name. If anyone continues to harass them, let the one accused be released, even though he be found to be a Christian, and let the informer be punished.” (Church History IV.13, Loeb).
At first glance, this sounds as if Antoninus protected Christians. But the evidence of the time says otherwise.
- Justin begged that Christians not be condemned for the name alone — which shows they were.
- Polycarp was executed for refusing to deny Christ.
- Justin’s Second Apology explicitly describes Christians punished “merely for being called a Christian.”
For these reasons, most historians conclude that Eusebius was wrong in this instance — either quoting a spurious decree or idealizing Antoninus. Whatever Antoninus may have written, Christians still died for their confession of Christ.
Conclusion
Antoninus Pius is remembered by Roman historians as the calmest, most peaceful emperor of the second century. But for Christians, his reign looked different.
- Justin Martyr wrote eloquent defenses of Christianity, describing their moral life and Sunday worship — but still had to plead that Christians not be killed for the name alone.
- Polycarp was executed, proving that even in a so-called peaceful reign, death was the cost of faith.
- The Epistle to Diognetus portrayed Christians as citizens of heaven, foreigners in every land.
- Hegesippus preserved the memory of apostolic succession and the purity of the early church.
- And Eusebius’ rosy decree about Antoninus was almost certainly wrong.
Antoninus’ reign demonstrates a crucial point: even when Rome was at peace, Christians were not safe. Their very identity was enough to condemn them. Yet it was in this climate that Christianity’s first great apologists wrote, its first great martyrdom was recorded, and its distinct self-understanding emerged.
The empire might call Antoninus Pius — dutiful and devout. But for Christians, true piety meant loyalty to a greater King, even unto death.
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