4th century in Armenia

alphabet used to write the Armenian language

parts of Kingdom of Armenia that became part of the Byzantine Empire

Yererouk (, ), also Yereruyk or Ererouk, is an ancient Armenian church near the village of Anipemza in the Shirak Province of Armenia. Yererouk was built on a plateau near the Akhurian River, which defines the frontier with Turkey, about 5 km southeast of the ancient city of Ani.

4th century treaty between the East Roman and Sassanid Empires

371 battle of the Roman–Persian Wars