Antoninus Pius

Roman emperor, AD 138–161AD 86 – AD 161Also: Titus Aelius Hadrianus Antoninus

Roman emperor from 138 to 161, adopted by Hadrian as his successor. Justin Martyr addressed his First Apology to him, and Melito of Sardis later said that he had written to Greek cities forbidding new measures against Christians.

Antoninus was born on 19 September in the year of Domitian’s twelfth consulship, AD 86 (Historia Augusta, Antoninus Pius 1.8). He succeeded Hadrian in 138 and died after twenty-two full years of rule, when Marcus Aurelius and Lucius Verus followed him (Eusebius, Church History 4.14.10). Hadrian, near death and without a son, adopted him on condition that he in turn adopt the young Marcus Aurelius and Lucius Verus (Cassius Dio, Roman History 69.20–21) (Historia Augusta, Antoninus Pius 4.5).

Justin Martyr addressed his First Apology to him and to those two adopted sons (Justin, First Apology 1). Melito, bishop of Sardis, writing to Marcus Aurelius, says that Antoninus wrote to Larissa, Thessalonica, Athens and “all the Greeks” forbidding new measures against Christians (Eusebius, Church History 4.26.10). Eusebius quotes as his a letter to the assembly of Asia which orders that accusers of Christians be punished, though the copy he gives is headed with the name of Marcus Aurelius; another copy, under Antoninus’s own name, is attached to Justin’s Apology (Eusebius, Church History 4.12–13) (Justin, First Apology appendix). A. C. McGiffert, the translator of Eusebius used here, calls it “undoubtedly spurious” in his note (Eusebius, Church History 4.13, translator’s note). Polycarp is commonly held to have died in his reign: see the Martyrdom of Polycarp.

In the timeline

  1. about AD 155 to AD 165, estimated date
    Justin Martyr Defends the Faith and Describes Its Worship

    Justin, a philosopher turned Christian teacher at Rome, addresses a defence of the Christians to the emperor Antoninus Pius and describes their baptism and Sunday Eucharist. Some years later he is tried by the city prefect and beheaded.

Primary sources

Historia Augusta

Fourth century AD · Latin

Church History

Eusebius of Caesarea · c. AD 311–325, in successive editions · Greek

Roman History

Cassius Dio · c. AD 200–235 · Greek

First Apology

Justin Martyr · c. AD 150–155 · Greek

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