Stephen Nguyen

The Municipal Theatre of Saigon, also known as Saigon Municipal Opera House (Vietnamese: Nhà Hát Lớn; French: Opėra Municipal de Saigon), is an opera house in Saigon, Vietnam. It is an example of French Colonial architecture in Vietnam.
Built in 1897 by French architect Eugène Ferret as the Opėra de Saigon, the 500 seat. The building was used as the home of the Lower House assembly of South Vietnam after 1956. It was not until 1975 that it was again used as a theatre, and restored in 1995. 

- Wikipedia

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The first picture is the original Post Card dated 1916.

In the second picture the building was used as the home of the Lower House Assembly 1956 - 1975.

Thirth picture was took in 2013, after it was restored in 1995 to original look.