Poseidon was one of the Twelve Olympians in ancient Greek religion and myth. He was god of the Sea and other waters; of earthquakes; and of In pre-Olympian Bronze Age Greece, he was venerated as a chief deity at Pylos and
"Sparta has no walls because you, her warriors, are her walls. Sparta’s boundaries are undefined because these your spear-points define her borders. So when the Barbarians come, let them find nothing but death on the frontiers of Sparta!