Erebuni Historical-Archaeological Reserve-Museum, was established on October 19, 1968. The opening of the museum was timed to coincide with the 2750th anniversary of Yerevan. The Museum stands at the foot of the Arin Berd hill, on top of which the Urartian Fortress Erebouni has stood since 782 BCE. The city-fortress was excavated, some parts of the structure were reinforced and restored, and the fortress was turned into an outdoor museum.