According to Roman founding legends, the Tarpeian Rock derives its name from the Vestal Virgin (see Varro L. L. V.41) Tarpeia, a Roman heroine and daughter of Spurius Tarpeius, who was commander of the Capitoline fortress under Rome's first king, Romulus. Tarpeia's death resulted from a war between the Romans and Sabines. Romulus abducted Sabine women for the purposes of providing Romans with wives and heirs.
There are several strains of Tarpeia's story, but the most common tells of Tarpeia letting the enemy Sabines enter Rome by unlocking the gate only after making the Sabines swear to hand over their shields (bracelets, as told in some strains of the story). Though Tarpeia let the Sabines into the gate, her purpose was to trick them into surrender or defeat. The Sabines, upon the realization, threw their shields at Tarpeia, thereby killing her. In another version, the Sabines killed Tarpeia for her treachery, as they could not trust a Roman who betrayed her own people. Either way, the Romans, unsure as to Tarpeia's motive, used the Tarpeian Rock as a place of execution for traitors.
Sources:- Cotterell, Arthur and Rachel Storm. The Encyclopedia of World Mythology. 2004
- Hornblower, Simon and Antony Spawforth. The Oxford Classical Dictionary. 2003
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