French era In 1861, the French colonial government established a prison on the island to house prisoners who had committed especially severe crimes. After the turn of the century, the prison held an increasingly larger population of
political prisoners. In 1954, it was turned over to the
South Vietnamese government, who continued to use it for the same purpose. Notable prisoners held at Côn Sơn included
Huỳnh Thúc Kháng from 1908–1921,
Phan Châu Trinh from 1908–1911,
Tôn Đức Thắng,
Phạm Văn Đồng and
Lê Đức Thọ in the 1930s, and
Nguyễn An Ninh who died in the prison on 14 August 1943, possibly killed by his jailers for fear that he might be used politically by the Japanese.
Võ Thị Sáu was executed at the prison in 1952 (though she was imprisoned at the police post outside of the prison). Not far from the prison is
Hàng Dương Cemetery, where some of the prisoners who died between 1941 and 1975 were buried.
Vietnam War During the
Vietnam War, the prison was used to hold political prisoners and prisoners of war. In July 1970, two
U.S. Congressional representatives,
Augustus Hawkins and
William Anderson, visited the prison. They were accompanied by
Tom Harkin (then an aide), translator
Don Luce, and
USAID Office of Public Safety Director Frank Walton. When the delegation arrived at the prison, they departed from the planned tour, guided by a map drawn by a former detainee. The map led to the door of a building, which was opened from the inside by a guard when he heard the people outside the door talking. Inside they found prisoners were being shackled within cramped "tiger cages". Prisoners began crying out for water when the delegation walked in. They had sores and bruises, and some were mutilated. Harkin took photos of the scene. The photos were published in
Life magazine on 17 July 1970. == Tiger cage ==