On 9 September 1919, the National Assembly of Armenia founded the History Museum of Armenia. The museum opened to visitors on August 20, 1921. Its first director was Yervand Lalayan.
On June 4, a strong earthquake completely destroyed the town. The Yerevan Fortress was destroyed completely, so were the following churches: Poghos-Petros, Katoghike, Zoravor and the Gethsemane Chapel.