Supermax prison
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A super-maximum security (supermax) or administrative maximum (ADX) prison is a "control-unit" prison, or a unit within prisons, which represents the most secure level of custody in the prison systems of certain countries.
ADX Florence
Alcatraz Island is a historical prototype of the supermax prison standard.
Allan B. Polunsky Unit houses State of Texas supermax units
Stammheim Prison
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Stammheim Prison is a prison in Stuttgart, Baden Württemberg, Germany. It is situated on the northern boundaries of Stuttgart in the city district of Stuttgart-Stammheim, right between fields and apartment blocks on the fringes of Stammheim. The prison was built as a supermax prison between 1959 and 1963 and taken into operation in 1964.
Panorama of Stammheim Prison (as of 2007)
Members of the Red Army Faction smuggled a pistol into the prison by concealing it in a book.