Картлис цховреба
The eastern Georgian Kingdom of Iberia became one of the first states in the world to convert to Christianity in 327, when the King of Iberia Mirian III established it as the official state religion. However, the date varies based on numerous accounts and historical documents, which indicate Iberia adopting Christianity as a state religion in 317, 319, 324, 330 etc. According to The Georgian Chronicles, St. Nino of Cappadocia converted Georgia to Christianity in 330 during the time of Constantine the Great. By the middle of the 4th century though, both Lazica (formerly the Kingdom of Colchis) and Iberia adopted Christianity as their official religion. This adoption of Christianity tied the kingdom to the Byzantine Empire, which exerted strong cultural influence over it.