Gytheio (Greek: Γύθειο, [ˈʝiθio]) or Gythio, also the ancient Gythium or Gytheion (Ancient Greek: Γύθειον), is a town on the eastern shore of the Mani Peninsula, and a former municipality in Laconia, Peloponnese, Greece. Since the 2011 local government reform it is part of the municipality East Mani, of which it is a municipal unit. The municipal unit has an area of 197.313 km2. It was the seaport of Sparta, some 40 kilometres (25 miles) north. Gytheio is the site of ancient Cranae, a tiny island where according to legend Paris of Troy and Helen from Sparta spent their first night together before departing for Troy, thus igniting the Trojan War.