Con Son Island prison
Coordinates: 8°41′35″N 106°36′34″E / 8.69306°N 106.60944°E
Côn Sơn, also known as Côn Lôn, is the largest island of the Côn Đảo archipelago, off the coast of southern Vietnam.
Its French variant Grande-Condore was well-known during the times of French Indochina. Marco Polo mentioned the island in the description of his 1292 voyage from China to India under the name Sondur and Condur. In Ptolemy's Geography, they are referred to as the Isles of the Satyrs.
In 1702, the English East India Company founded a settlement on this island (the English called it 'Pulo Condore') off the south coast of southern Vietnam, and in 1705 the garrison and settlement were destroyed.
In 1787, through the Treaty of Versailles, Nguyễn Ánh (the future Emperor Gia Long) promised to cede Poulo Condor to the French. In exchange Louis XVI promised to help Nguyễn Ánh to regain the throne, by supplying 1,650 troops (1,200 Kaffir troops, 200 artillery men and 250 black soldiers) on four frigates.
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