[1][2] The school is located in the vicinity of the Assumption Cathedral in Bang Rak District, Bangkok.
Rising anti-clericalism in France during the Third Republic, culminating in 1905 French law on the Separation of the Churches and the State, increased pressure on the mission to accelerate their effort overseas.
The Apostolic Vicar of Eastern Siam, Bishop Jean-Louis Vey, M.E.P., proposed to set up a school for girls to learn how to sew and how to speak English, German, Portuguese, and French.
[3] Thus, Assumption Convent School was founded on 2 March 1904, and had Soeur Saint Xavier as its first superior.
It is a three-storey building in Colonial style, with arched windows and a front portico demonstrating Classical influence.