Atlantis is a legendary island in the Atlantic, west of Gibraltar, that sunk beneath the sea during a violent eruption of earthquakes and floods some 9,000 years before Plato wrote about it in his Timaeus and Critias. In a discussion of utopian societies, Plato claims that Egyptian priests told Solon about Atlantis. Plato was not describing a real place any more than his allegory of the cave describes a real cave. The purpose of Atlantis is to express a moral message in a discussion of ideal societies, a favorite theme of his. The fact that nobody in Greece for 9,000 years had mentioned a battle between Athens and Atlantis should serve as a clue that Plato was not talking about a real place or battle. Nevertheless, Plato is often cited as the primary source for the reality of a place on earth called Atlantis. Here is what the Egyptian priest allegedly told Solon: Many great and wonderful deeds are recorded of your state in our histories. But one of them exceeds all the rest in greatness and valour. For these histories tell of a mighty power which unprovoked made an expedition against the whole of Europe and Asia, and to which your city put an end. This power came forth out of the Atlantic Ocean, for in those days the Atlantic was navigable; and there was an island situated in front of the straits which are by you called the Pillars of Heracles; the island was larger than Libya and Asia put together, and was the way to other islands, and from these you might pass to the whole of the opposite continent which surrounded the true ocean; for this sea which is within the Straits of Heracles is only a harbour, having a narrow entrance, but that other is a real sea, and the surrounding land may be most truly called a boundless continent. Now in this island of Atlantis there was a great and wonderful empire which had rule over the whole island and several others, and over parts of the continent, and, furthermore, the men of Atlantis had subjected the parts of Libya within the columns of Heracles as far as Egypt, and of Europe as far as Tyrrhenia. This vast power, gathered into one, endeavoured to subdue at a blow our country and yours and the whole of the region within the straits; and then, Solon, your country shone forth, in the excellence of her virtue and strength, among all mankind. She was pre-eminent in courage and military skill, and was the leader of the Hellenes. And when the rest fell off from her, being compelled to stand alone, after having undergone the very extremity of danger, she defeated and triumphed over the invaders, and preserved from slavery those who were not yet subjugated, and generously liberated all the rest of us who dwell within the pillars. (Timaeus)