 In Rome, this was known as the "ritus graecus Cereris"; its priestesses were granted Roman citizenship so that they could pray to the gods "with a foreign and external knowledge, but with a domestic and civil intention".The cult was based on ancient, ethnically Greek cults to Demeter, most notably the Thesmophoria to Demeter and Persephone, whose cults and myths also provided a basis for the Eleusinian mysteries.From the end of the 3rd century BC, Demeter's temple at Enna, in Sicily, was acknowledged as Ceres' oldest, most authoritative cult centre, and Libera was recognised as Proserpina, Roman equivalent to Demeter's daughter Persephone.