🇪🇬 Egypt · Submerged site
Clysma (Suez) – Roman Nile–Red Sea Canal Harbour
Pharaonic to Islamic (1870 BCE – 642 CE) · Pharaonic / Ptolemaic / Roman / Byzantine / Early Islamic
Trajanic canal harbour 500×300 m silted 2 m under Suez – lock gates at +2 m.