Athenaeum_(fort)
Athenaeum or Athenaion (Ancient Greek: Ἀθηναῖον), was a fortress in the south of ancient Arcadia, and in the territory of Megalopolis. It is described by Plutarch as a position in advance of the Lacedaemonian frontier (ἐμβολὴ τῆς Λακωνικῆς), and near Belemina.[1] It was fortified by Spartan king Cleomenes III in 224 BCE, and was frequently taken and retaken in the wars between the Achaean League and the Spartans.[2]