In the early morning of July 21, 365 CE, the eastern Mediterranean did something no one could explain. It fled. Along the coasts of Alexandria, Crete, and much of the Greek world, the sea withdrew far beyond the shoreline. For over forty minutes, the seabed lay exposed—ships stranded on dry ground, fish flailing in the open air, wrecks revealed like shameful secrets dragged into daylight. Then the sea came back. Not as a wave—but as annihilation. A tsunami rising up to 30 meters slammed into the