Achaiion or Achaeïum or Achaeum () was a town in the Tenedian Peraia of the ancient Troad.Pleiades The legend (ACH) which some bronze coins found in this region bear is thought to refer to by Louis Robert, but others attribute the coins to Achilleion.asiaminorcoins.com - coins of Achilleion; B.V. Head, Historia Numorum2 540, SNG Cop. Troas 64; objects that whereas Achilleion is twice attested as a polis and therefore capable of minting coins (Herodotus 5.94.2, Stephanus of Byzantium s.v. Σίγειον) Achaiion never had political autonomy and always belonged to the Tenedian Peraia.
Its site is located near Hantepe, Asiatic Turkey.
References