2nd century BC - Records found at many Egyptian and Mesopotamian archeological sites proved the existence of the earliest prisons in the world.
600 BC - The remains of the oldest known prison can be traced to the Ancient Rome and their "CarcereMamertino" (Mamertine Prison). Originally designed as a cistern for water, this ancient prison was used for more than half millennia. One of its most famous prisoners was Gallic chieftain Vercingetorix (executed at 46 BC).