Elefsina (Greek: Ελευσίνα, Ancient/Katharevousa: Ἐλευσίς Eleusis) is a town an municipality about 20 km NW of Athens. It is located near the northernmost end of the Saronic Gulf and is the seat of administration of West Attica Prefecture. It is best known for having been the site of the Eleusinian Mysteries, the most famous religious center of ancient Greece. It was also the birth place of Aeschylus, one of the three great tragedians of antiquity. See also Metanira.