Armenia Adopts Christianity

Traditional date

King Tiridates of Armenia, by the account of the Armenian church, is converted by Gregory the Illuminator and brings his court and people to baptism. The Armenian church dates this to 301; the story was written down more than a century later.

There were Christians in Armenia before the kingdom’s conversion. Eusebius lists among the letters of Dionysius of Alexandria, who wrote about the middle of the third century, one on repentance “to the brethren in Armenia”, whose bishop was named Merozanes (Eusebius, Church History 6.46.2). How the royal house came to the faith is told at length in the History that bears the name of Agathangelos, written in Armenian well over a century after the events. What follows is its account, as given in the abridged English version linked here.

Gregory the Illuminator was the son of a Parthian noble who had murdered the Armenian king. He was carried as an infant to Roman territory and brought up a Christian at Caesarea in Cappadocia. The murdered king’s son, Tiridates III, grew up in the Roman empire, served in its army, was honoured by the emperor and won back his throne with a great army. Gregory entered his service without saying who he was (Agathangelos, History 1.5–14). When he refused to honour the goddess Anahit the king had him tortured and then, learning whose son he was, thrown into a pit, where he survived for thirteen years (Agathangelos, History 1.15–26).

Meanwhile, the History continues, a company of Christian women, led by Gayane and including the beautiful Hripsime, fled from the emperor Diocletian to the royal city of Vagharshapat. Tiridates desired Hripsime, was refused, and had the women killed (Agathangelos, History 2.3–15). He was then struck with madness and behaved like an animal. His sister learned in a vision that only the prisoner in the pit could help. Gregory was drawn up alive, and the king knelt before him (Agathangelos, History 2.16–19).

In the same account Gregory preached for many days, buried the martyrs, and told of a vision in which a column of fire with a cross of light marked the place in the city where a church was to be built. The king was healed and gave orders for the pagan shrines to be destroyed (Agathangelos, History 3.1–19). Tiridates then sent Gregory to Caesarea, where Bishop Leontius and his colleagues consecrated him bishop (Agathangelos, History 3.22–25). On his return he baptised the court and a great number of people in the Euphrates, set up churches with priests and bishops, and had children taught to read the Scriptures in Syriac and Greek (Agathangelos, History 4.5–9).

Two notices from outside Armenia stand beside this. The Greek historian Sozomen, about 440, had heard that Tiridates became a Christian through a divine sign in his own house and ordered his subjects by herald to adopt the same religion (Sozomen, Church History 2.8). Eusebius, a contemporary, says that the emperor Maximinus went to war with the Armenians, old allies of Rome, because they were Christians and he tried to force them to sacrifice, and that he was defeated (Eusebius, Church History 9.8.2–4). Eusebius thus counts the Armenians as Christians by about 312. The Armenian Apostolic Church commemorates Gregory’s release from the pit as the beginning of the nation’s conversion, as the dating note shows. If the conversion is put about 314, it belongs to the years in which the Roman state gave up persecution; if in 301, it came before the last persecution began. Either way it took place in a kingdom that Eusebius calls an ally of Rome (Eusebius, Church History 9.8.2–4).

How this is dated

Traditional date. From later tradition or from internal biblical chronology, with no outside anchor.

The History of Agathangelos, in the abridgement linked here, gives no dates, and it was written in the second half of the fifth century. The year 301 is the date kept by the Armenian Apostolic Church: its calendar says that Gregory’s release from the pit “in the year 301” began the conversion of the nation (Mother See of Holy Etchmiadzin).

Many historians prefer a date about 314. The participants in an international symposium on the subject reached a broad consensus that 301 is “historically untenable” and that 314 is far more likely, according to the publisher’s summary of its proceedings (Werner Seibt, ed., Die Christianisierung des Kaukasus / The Christianization of Caucasus, Vienna, 2002). The fixed points from outside Armenia are few. Eusebius, a contemporary, calls the Armenians Christians when the emperor Maximinus attacked them, which was about 312 (Eusebius, Church History 9.8.2–4); and Agathangelos sends Gregory to be consecrated by Leontius of Caesarea and has Gregory’s son attend the Council of Nicaea in 325 (Agathangelos, History 3.22–25) (Agathangelos, History 4.19). The timeline shows the traditional year and both dates.

Primary sources

Church History

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

Church History

Sozomen · c. AD 439–450 · Greek

Every citation on this page was independently checked against its source on 3 October 2026.

In context

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  1. c. AD 326–337, estimated date
  2. 1915 to 1916, firm date

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