Claudia Quinta was a Roman matron said to have been instrumental in bringing the goddess Cybele, "Great Mother" of the gods from her shrine in Greek Asia Minor to Rome in 204 BC, during the last years of Rome's Second Punic War against Carthage. The goddess had been brought in response to dire prodigies, a failed harvest and the advice of various oracles. Roman histories and stories describe Claudia Quinta as castissima femina (purest or most virtuous woman) in Rome, chosen along with Scipio Nasica, Rome's optimus vir ("best man") to welcome the goddess. Gossips had accused Claudia of inchastity; but when the ship that carried the goddess's image up the River Tiber stuck fast on a sandbar, Claudia prayed for the goddess's help, then released and towed the ship single-handed. This miraculous feat proved Claudia's reputation and the goddess's willingness to become Rome's protector. Soon after, Rome had a good harvest, then defeated the Carthaginian leader Hannibal. Accounts of Cybele's arrival and her transformation into Rome's Magna Mater were embellished over time with circumstantial details, and formed part of the goddess's founding festival, Megalesia.
These stories, and the pageants of Megalesia, were used to promote the goddess herself, traditional Roman values, and the status and reputation of Rome's ruling families. Magna Mater was conscripted to the Roman cause at a particularly unstable time in the city's history; the choice of Claudia Quinta and Scipio Nasica as the best of their kind may reflect their enrollment in a show of unity. Claudia's legend in particular became increasingly fantastical and embroidered, and cast idealised reflections on those who might be considered her descendants. In the Republican era, Cicero offered Claudia's exceptional reputation for pudicitia (sexual virtue) as the moral opposite to Clodia's, to undermine the latter's moral fitness to offer testimony against his client; and to accentuate the infamy of Clodia's brother Clodius, accused of deliberate sacrilege at Magna Mater's festival. The emperor Claudius claimed Claudia as an ancestor and may have promoted her cult, alongside that of Magna Mater and her divine consort, Attis.