Tiridates III of Armenia
Tiridates III (or Trdat III) was the king of Armenia (286-330), and was also known as Tiridates the Great. (Some scholars may be wrong because they call him as Trdat IV as a result of the fact that Tiridates I of Armenia reigned twice.) In 301, Tiridates made Christianity as the sole religion in Armenia, making Armenia the first Christian state in the world.