Armenia was the first country to adopt Christianity as its state religion, traditionally in AD 301. According to Armenian tradition, King Tiridates III converted after Saint Gregory the Illuminator helped cure him and then established Christianity as the kingdom’s official faith.
The date 301 is widely associated with this event, although some modern historians place the formal adoption slightly later, around 314. Armenia’s Christian identity is closely linked to the Armenian Apostolic Church, which belongs to the Oriental Orthodox family and follows traditions distinct from both Roman Catholicism and Eastern Orthodoxy.
The conversion helped shape Armenian architecture, literature, and political identity. The monastery of Khor Virap, traditionally associated with Gregory’s imprisonment, stands near Mount Ararat and is one of the country’s best-known religious sites. Georgia also adopted Christianity early, but Armenia is generally credited with being the first state to make it official.