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.
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1924
The general plan of Yerevan was created by Alexander Tamanyan. The plan was updated in 1932.
1936
The Children's Railroad was built in the Hrazdan Gorge.
