Ancient Rome is famous for its extreme and bizarre penal system, where punishments were used for deterrence and social control. The penalty depended heavily on the offender’s social class. Romans (citizens of Rome) were exempt from cruel punishments such as crucifixion. Only non-Romans could be crucified. However, a Roman could be found by a judge guilty of crimes against the people and stripped of his citizenship. He is then considered an outlaw and may be killed or tortured by anyone for any reason, or no reason.
In ancient Rome, punishments for theft (furtum) varied drastically. If caught red-handed (manifestum) and a slave or non-citizen, the punishment could be hard labour or execution. Citizens typically paid fines ranging from double to quadruple the stolen item's value.
 | When Tarpeia let the enemy Sabines into Rome, she was thrown from a precipice above the Roman forum. It then became established practice to throw traitors from the Tarpeian Rock. Such tales served as a warning for future citizens.
Roman society was patriarchal. The family’s oldest living male had, in theory, the power to kill anyone within his household with impunity. This included not only those living under his roof, but the wider family as well. |  |
Parricides were punished by being 'condemned to the beasts', which was popular in the Roman world. | Anyone who killed his father, mother, or another relative (parricide) was subjected to the “punishment of the sack” (poena cullei). This allegedly involved the criminal being sewn into a leather sack together with four animals – a snake, a monkey, a rooster, and a dog – then being thrown into a river. The emperor Constantine’s penalty for parricide only specified that snakes should be used. |  |
Vestal Virgins who broke their vows of chastity were buried alive in an underground chamber with bread, water, and a lamp.
 | Common crimes, such as brawling, would likely result in beatings with sticks, or lashings with a whip. Prisons existed only for temporary stays before trial. Criminals found guilty were assigned for gladitorial combat or the mines. Taking part in the Roman census was compulsory as the state needed a complete record of citizens’ property for taxation. According to Dionysius of Halicarnassus, the sixth king of Rome Servius Tullius decreed that anyone who did not participate in the census would lose their property and be sold into slavery. |
Roman law was not uniform. Colony rule was often corrupt and Rome favored some colonies more than others.