Aesis
Αϊ̓δις
Aesis or AESIUM (Αϊ̓δις, Ptol.; Αϊ̓διον, Strab.; Eth. Aesinas,--atis), a town of Umbria situated on the N. bank of the river of the same name, about 10 miles from its mouth. It is still called Iesi, and is an episcopal town of some consideration. Pliny mentions it only as an ordinary municipal town: but we learn from several inscriptions that it was a Roman colony, though the period when it attained this rank is unknown. (Inscrr. ap. Gruter. p. 446. 1, 2; Orelli, no. 3899, 3900; Zumpt, de Colon. p. 359.) According to Pliny (Plin. Nat. 11.42, 97) it was noted for the excellence of its cheeses.
The form Aesium, which is found only in Strabo, is probably erroneous, Αἴσιονζζζ being, according to Kramer, a corrupt reading for Ἀδίδιον. (Strab. v. p.227; Ptol. 3.1.53; Plin. Nat. 3.14. 19.)
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.