Libera is a fertility goddess in ancient Roman religion. Her origins are unknown; she may have been a fertility goddess of archaic or pre-Roman Magna Graecia. Her Latin name is the feminine form of Liber, (free, or in a cult context, The Free One). At some time during Rome's Regal or very early Republican eras, she became a female counterpart of Liber, also known as Liber Pater (The Free Father), Roman god of wine, male fertility, and a guardian of plebeian freedoms.[1] In this form, she enters Roman history as Triadic cult companion to Ceres and Liber in a temple established on the Aventine Hill ca. 493 BC. The location and context of this early cult mark her association with Rome's commoner-citizens, or plebs; she might have been offered cult as part of Liber's festival, Liberalia, or during Cerealia, in which she would have been subordinate to Ceres. Otherwise, her relationship to her Aventine cult partners is uncertain. [2]
With the institution of the ritus graecia cereris (greek rites of Ceres) c.205 BC, Libera was officially identified with Ceres' daughter Proserpina and acquired with her a Romanised form of Greek mystery rite and attendant mythology, based on Greek cults to Demeter and Persephone. In the late Republican era, Cicero describes Liber and Libera as Ceres' children. At around the same time, possibly in the context of popular or religious drama, Hyginus equates her with Greek Ariadne, as bride to Liber's Greek equivalent, Dionysus: therefore her mythographic associations and identity seem far from straightforward.[3] The older and newer forms of her cult and rites, and their diverse associations, persisted well into the late Imperial era. St. Augustine (AD 354 – 430) observes that Libera is concerned with female fertility, as Liber is with male fertility.[4]