Thomas De Waal. The Caucasus: An Introduction. Oxford University Press. 2018: 103-312. The demographics of the region have fluctuated sharply over time, but an Armenian presence has been recorded there off and on for centuries, and the hills are dotted with medieval Armenian churches, such as Amaras and Gandzasar
Movses Kaghankatvatsi. History of Aluank. Book I. Chapter XIV. After accepting the rank of [the country's] high priest, he left to enlighten the countries of Iberia and Aluank. He arrived in the ghavar of Haband and preached and admonished not to break the commandments of the Son of God. Here he began the building of a church in Amaras and hired workers and foremen to finish it. After returning to Armenia, he consecrated and appointed instead of himself his son Vrtanes, filled with his father's virtues, who lived according to the [Christian] teaching and punished and admonished all those who adhered to the heresy of idol-worship.