Prison

A prison,^[a] also known as a jail,^[b] gaol (dated,^[c] standard English, Australian, and historically in Canada), penitentiary (American English and Canadian English), detention center (or detention centre outside the US),^[d] correction center, correctional facility, lock-up,^[e] hoosegow or remand center, is a facility in which inmates (or prisoners) are confined against their will and usually denied a variety of freedoms under the authority of the state as punishment for various crimes. Prisons are most commonly used within a criminal justice system: people charged with crimes may be imprisoned until their trial; those pleading or being found guilty of crimes at trial may be sentenced to a specified period of imprisonment. In simplest terms, a prison can also be described as a building in which people are legally held as a punishment for a crime they have committed.

Prisons can also be used as a tool of political repression by authoritarian regimes. Their perceived opponents may be imprisoned for political crimes, often without trial or other legal due process; this use is illegal under most forms of international law governing fair administration of justice. In times of war, prisoners of war or detainees may be detained in military prisons or prisoner of war camps, and large groups of civilians might be imprisoned in internment camps.

In American English, the terms prison and jail have separate definitions, though this is not always strictly adhered to in casual speech.^[4] A prison or penitentiary holds people for longer periods of time, such as many years, and is operated by a state or federal government. A jail holds people for shorter periods of time (e.g. for shorter sentences or pre-trial detention) and is usually operated by a local government, typically the county sheriff. Outside of North America, prison and jail often have the same meaning.

Some Ancient Greek philosophers, such as Plato, began to develop ideas of using punishment to reform offenders instead of simply using it for its own sake. Imprisonment as a penalty was used initially for those who could not afford to pay their fines. Eventually, since impoverished Athenians could not pay their fines, leading to indefinite periods of imprisonment, time limits were set instead.^[5] The prison in ancient Athens was known as the desmoterion ("place of chains").^[6]

The Romans were among the first to use prisons as a form of punishment rather than simply for detention. A variety of existing structures were used to house prisoners, such as metal cages, basements of public buildings, and quarries. One of the most notable Roman prisons was the Mamertine Prison, established around 640 B.C. by Ancus Marcius. The Mamertine Prison was located within a sewer system beneath ancient Rome and contained a large network of dungeons where prisoners were held in squalid conditions,^[7] contaminated with human waste. Forced labor on public works projects was also a common form of punishment. In many cases, citizens were sentenced to slavery, often in ergastula (a primitive form of prison where unruly slaves were chained to workbenches and performed hard labor).^{[citation needed]}

In Medieval Songhai, results of a trial could have led to confiscation of merchandise or imprisonment as a form of punishment, since various prisons existed in the empire.^[8]