Nymphaeum or Nymphaion (Greek, Ancient (to 1453);: Νύμφαιον or Νυμφαῖον) was a town on the eastern coast of ancient Bithynia located on the Black Sea, at a distance of 30 stadia west of the mouth of the Oxines,[1] or 45 stadia from Tyndaridae.[2]
Its site is unlocated.