The Christianization of Armenia began in the early 4th century when Saint Gregory the Illuminator converted King Tiridates III to Christianity. This pivotal event led to Armenia becoming the first nation to adopt Christianity as its state religion in 301 AD. The establishment of the Armenian Apostolic Church played a crucial role in shaping the country's identity and culture. Following its conversion, Armenia faced various challenges, including invasions and the spread of other religions. Despite these obstacles, the Christian faith deeply influenced Armenian art, literature, and architecture, leading to the construction of iconic structures like the Etchmiadzin Cathedral, which remains a symbol of Armenian Christianity today.