 In reality there is no historical evidence which can link Alcara with Turio or rather identify Alcara with the Greco-Roman city of Turiano documented on fountains in the village, besides the denomination of the "Castle Turio," the remains of a fortification which dominates the village.Equally without any historical evidence is the identification of Alcara with the greco-Byzantine city of Demenna which in any case could reasonably be localized in the area of the Nebrodi, including the area between San Marco d'Alunzio, Alcara, and Longi.Controversial also is the locality of the greco-sicanian city of Crasto (Krastos) which according to various local historians fluctuates from Western Sicily, Southern Sicily, and Eastern Sicily, but that should not deviate too much from the area between Agrigento and Imera, despite the presence of rocky outcrops of "Crasto" just above the habitation of Alcara.