Beneath the waters of Abukir Bay, at the edge of the Nile Delta, lie the submerged remains of ancient Egyptian cities that sank over 1,000 years ago only to be rediscovered in the late twentieth century. Pioneering underwater excavations have yielded a wealth of ancient buildings and artifacts, including temples, harbor installations, and no fewer than sixty-nine shipwrecks. Some of the greatest of these treasures will be exhibited in London for...