ALEXANDRIA: Egypt on Thursday unveiled parts of a sunken city submerged beneath waters off the coast of Alexandria, revealing buildings, artefacts and an ancient dock, all dating back over 2,000 years. Egyptian authorities said the site, located in the waters of Abu Qir Bay, may be an extension of the ancient city of Canopus, a prominent center during the Ptolemaic dynasty, which ruled Egypt for nearly 300 years, and the Roman Empire, which governed for around 600 years.