(Sic. Aggira) is a town in the province of Enna, Sicily. It is located in the mid-valley of the River Salso, 15 miles (24 km.) east-northeast of Enna, and some 28 miles (45 km.) west-southwest of Mount Etna. Until 1861 it was called San Filippo d'Argiriò. In classical times it was the home town of Diodorus Siculus (fl. mid 1st cent. BCE), the famous Græco-Roman historian.