Prisons

thumb|A 19th-century jail room at a Pennsylvania museum A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where people are imprisoned under the authority of the state, usually as punishment for various crimes. They may also be used to house those awaiting trial (pre-trial detention). Prisons serve two primary functions within the criminal-justice system: holding people charged with crimes while they await trial, and confining those who have pleaded guilty or been convicted to serve out their sentences

thumb|This plan of Jeremy Bentham's panopticon prison was drawn by Willey Reveley in 1791. The panopticon is a design of institutional building with an inbuilt system of control, originated by the English philosopher and social theorist Jeremy Bentham in the 18th century. The concept is to allow all prisoners of an institution to be observed by a single prison officer, without the inmates knowing whether or not they are being watched.

thumb|A watchtower on the Great Wall of China thumbnail|Saint Thomas Tower in [[Marsaskala, Malta]] A watchtower or guardtower (also spelled watch tower, guard tower) is a type of military/paramilitary or policiary tower used for guarding an area. Sometimes fortified, and armed with heavy weaponry, especially historically, the structures are built in areas of established control. These include military bases, cities occupied by military forces, prisons and more. A common equipment is searchlights.

vehicle designed or redesigned to transport prisoners

institution that allows people to re-integrate into society

prison where the detainees serve their sentences with minimal supervision

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violence inflicted onto either another inmate, a prison guard, or self-inflicted

prison system