Atlantis is a mythical island first mentioned in Plato dialogues "Timaeus" and "Critias", writen in 360 bc. According to Plato, Atlantis was a land and the sea power situated in front of the Pillars of Hercules that had conquered many parts of western Europe and Africa 9000 years before the time of the Athenian lawgiver Solon, i.e in the l0th millenium bc. After a failed attemp to invade Athens, Atlantis sank into the ocean in a single day and night of misfortune.