Atlantis

Atlantis is a fictional island mentioned in Plato's works Timaeus and Critias as part of an allegory on the hubris of nations. By describing Atlantis as a naval empire from the west that had conquered most of Europe and Libya, Plato purposely created a literary contrast with the Achaemenid Empire, the great land-based power that ruled the east. In Plato's account, Atlantis loses divine favor after... (Wikipedia)