Final answer:
Yerevan is the capital of Armenia, a country that was the first to adopt Christianity as a state religion.
Step-by-step explanation:
The capital of Armenia is Yerevan. It is one of the world's oldest continuously inhabited cities and serves as the capital of Armenia. Armenia is a small landlocked country located to the south of Georgia.
It has its own distinctive alphabet and was the first country to adopt Christianity as a state religion.