The megalithic hilltop fortresses built by the Ionians and Hellenes of ancient Greece at Mycenae, Tiryns, Pylos, Athens, and other locations, were constructed in the 1350 B.C. timeframe, as were the massive walls of Troy just across the Aegean, all constructed seemingly in concert, as if impending threats were all around those people who previously lived with modest defensive perimeter structures, but were then compelled to take serious defensive measures, during what is known as the greek Heroic Age, a frenzy of massive fortress building at that time.
The Acropolis (which means high city) at Athens was the site of only an ionian king’s palace, that of the legendary Erechtheus, circa 1350 B.C., which during his lifetime was fortified and enlarged to become a full-blown “mycenaean” hilltop fortress with megalithic walls around the perimeter of that high place, clearly to deter potential invaders. This Erechtheus (father of Theseus) is one of the king’s mentioned in Plato’s account of Atlantis who lived in the timeframe that Atlantis went under, that’s right folks, so Plato’s date of 9600 B.C. for Atlantis is contradicted by his own well-known greek history, among a variety of other contradictions (see category Atlantis Revealed) now exposed from his Dialogues with Critias and Timaeus, the information initially from egyptian priests.
So when you consider that a huge sea level rise (from icepack melting) and catastrophic rainfall reduction in the middle latitudes accompanied the end of the Ice Age, the frantic defensive building at the time Perseus, Erechtheus, Laomedon, Ilus, and Proteus makes sense, they had lost much land to the sea, as had the Atlanteans, so they were making the best of a bad situation, the other nations around the Mediterranean and in other parts of the world too, when Greece all but went dry, compared to what it had been according to Plato’s story born out by archaeo-botanical remains and bronze age settlements now beside long ago dried up streams, hundreds of them, which flourished during the Ice Age, really the “bronze age” too, see http://genesisveracityfoundation.com.