Early Roman history is full of stories about the terrible fates that befell citizens who broke the law. When a certain Tarpeia let the enemy Sabines into Rome, she was crushed and thrown headlong from a precipice above the Roman forum.
Such tales not only served as a warning for future generations, they also provided a backstory for some of Rome's cruelest punishments. Tarpeia is one of many legendary figures who appear in Livy's History from the Foundation of the City; Regardless of whether she was a real person, it became established practice to throw traitors from the “Tarpeian Rock”.
However, not all of the cruel and unusual punishments we associate with the Romans were carried out in practice or uniformly enforced, and some changed significantly over time.
Obey your father
Roman society was fundamentally hierarchical and patriarchal. A Roman paterfamilias (the family's oldest living male) had, in theory, the power to kill someone within his household with impunity. This included not only those physically living under his roof, but the wider family of brothers, sisters, nieces, and nephews as well.
However, historians have debated whether the power may have been largely symbolic and little used in practice. Filippo Carlà-Uhink has argued that the power did exist, but did not give heads of the household carte blanche to act as they pleased. For example, the senator Quintus Fabius Maximus Eburnus is said to have killed his son for his “dubious chastity”. But punishing a crime of a sexual nature was not seen as the proper use of a father's power, so Quintus himself was tried and exiled.
In order for the use of such power to be justified, the son had to have committed a crime against the state. When Aulus Fulvius was killed by his father for his involvement in the conspiracy of Catiline (63 BC), the head of the household was not prosecuted. This was because Catiline and his followers had committed treason by plotting to murder the consul Cicero and seize power for themselves.
A watery and crowded grave
One of the most pervasive misconceptions about Roman criminal justice concerns the penalty for parricide. Anyone who killed his father, mother, or another relative was subjected to the “punishment of the sack” (poena cullei in Latin). 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. But was such a punishment ever actually carried out?