Yervandashat founded in III century B.C. by King Orontes (Eruand) IV. The last Armenian king of the Orontid dynasty replaced Armenian capital from Armavir to Yervandashat. The city had strong walls, and many wonderful buildings. During sort time, Yervandashat became on of the biggest cities of Ancient Armenia. After several decades Armenian capital was replaced to Artashat.
In the 360s AD, Yervandashat was destroyed by the army of the Persian King Shapuh.