The Austrians built a Vauban-type fort there to defend it from the Ottoman Empire, and that fort would remain a bone of contention for the two empires.
The Citadel was built by the French officer Olivier de Puymanel for Nguyễn Ánh in 1793 with an area of 36,000 square meters according to the Vauban military architecture which was popular in Western Europe in 17th - 18th centuries.
His designs were so successful that he was nicknamed "The Naval Vauban".
At the age of seventeen Vauban joined the regiment of Condé in the war of the Fronde.
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Tellier, Luc-Normand, Face aux Colbert : les Le Tellier, Vauban, Turgot ... et l'avènement du libéralisme, Presses de l'Université du Québec, 1987, 816 pages.
Vauban | Sébastien Grosjean | Sébastien Érard | Saint-Sébastien-de-Morsent | Sébastien Viars | Sébastien Faure | Sébastien Demorand | Sébastien Le Prestre de Vauban | Patrick Sébastien | Louis-Sébastien Lenormand | canton of Marseille-Vauban | Stade Sébastien Charléty | Sebastien Vorbe | Sébastien Proulx | Sébastien Masi | Jean-Sébastien Giguère | Jean-Nicolas-Sébastien Allamand | Canton of Marseille-Vauban | Vauban | Sébastien Tellier | Sébastien Socchard | Sebastien Michaelis | Sébastien Lespès | Sébastien Le Prestre de Vauban | Sébastien Lareau | Sébastien Japrisot | Sébastien Foucan | Sébastien Chabal | Sebastien Chabal | Sébastien Bourdon |