In Posada (fig. 1), at the foot of the hill on which the medieval Castello della Fava stands, is the location where some scholars place the ancient settlement of "Feronia" (fig. 2), mentioned in the "Geography" treatise by Claudius Ptolemy, hypothesising the founding of a Roman settlement on the east coast of Sardinia during the fourth century B.C. (fig. 3).

Fig. 1 - Posada (from Google Earth).

This hypothesis is confirmed by the discovery in 1923, in an undisclosed location in Posada, of a bronze statue depicting an Italic-type Heracles, dated between the late fifth and early fourth centuries B.C., whose presence is compatible with the cult of worshipping Feronia and which may have been brought by Roman settlers or by mercenaries from Campania in the service of the Carthaginians.

Fig. 2 - Head of Feronia, II century B.C., Terracina (from https://it.wikipedia.org/wiki/Feronia#/media/File:Testa_di_Feronia_-_museo_archeologico_di_Rieti.jpg).

Fig. 3 - In red the indication of "Feronia civitas" in the Septima Europe Tabula map, in Ptolomeus Claudius, Cosmographia, Ulma 1482 (from http://www.sardegnacultura.it/imghigh/001.jpg).