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Prison Timeline of prison advancements is full of interesting facts and events. Here you can find how modern prison system came to be - from the early ancient prisons to the prison revolution during the reign of medieval kings, to the modern supermax prisons of today.
Although use of prisons was present since the ancient times, the modern age of prisons started in the medieval England. As the centuries went on, legal system of many countries advanced and final shape of modern prisons was formed during 20th century. Here you can find more about interesting history of prisons.