Crissaean Gulf in the context of "Rion Strait"

38°25′47″N 22°26′44″E / 38.4296°N 22.4455°E / 38.4296; 22.4455Cirrha or Kirra (Ancient Greek: Κίρρα) was a town in ancient Phocis on the coast, which served as the harbour of Delphi. Pausanias erroneously supposes that Cirrha was a later name of the Homeric Crissa. They were two separate towns, albeit with interlinked histories.

Crissa was more ancient than Cirrha, and was situated inland a little southwest of Delphi, at the southern end of a projecting spur of Mount Parnassus. Crissa gave name to the Crissaean Gulf, and its ruins may still be seen at a short distance from the modern village of Chrisso. Cirrha was built subsequently at the head of the gulf, and rose into a town from being the port of Crissa. This is in accordance with what we find in the history of other Grecian states. The original town is built upon a height at some distance from the sea, to secure it against hostile attacks, especially by sea; but in course of time, when property has become more secure, and the town itself has grown in power, a second place springs up on that part of the coast which had served previously as the port of the inland town. This was undoubtedly the origin of Cirrha, which was situated at the mouth of the river Pleistus, and at the foot of Mount Cirphis.

Chrisso (Greek: Χρισσό) is a village in Phocis, Greece. The modern village sits north of the ancient town of Crissa, a powerful city-state of ancient Greece which gave its name to the Crissaean plain and the Crissaean Gulf and lies in the southwestern foothills of Mount Parnassus. Chrisso is 2 km southwest of Delphi, 10 km southeast of Amfissa and 6 km northeast of Itea. The Greek National Road 48 (Nafpaktos - Delphi - Livadeia) passes west of the village. Chrisso belongs to the municipality of Delphi.

Oeantheia or Oiantheia (Ancient Greek: Οἰάνθεια) or Oeanthe (Οἰάνθη) or Euanthis (Εὐανθίς) or Euanthia (Εὐανθία) was an important town of the Ozolian Locrians, situated at the western entrance of the Crissaean Gulf. Polybius says that it is opposite to Aegeira in Achaea. Thucydides relates that during the Peloponnesian War, the Oeanthians are among several towns of the Locri Ozolae that were forced to provide hostages to the Lacedaemonian army in 426 BCE. The Periplus of Pseudo-Scylax calls the town Euanthis; and since Strabo says that Epizephyrian Locris in Italy was founded by the Ozolian Locrians, under a leader named Euanthes, it has been conjectured that Oeantheia or Euantheia was the place where the emigrants embarked. Oeantheia appears to have been the only maritime city in Locris remaining in the time of Pausanias (2nd century), with the exception of Naupactus. The only objects at Oeantheia mentioned by Pausanias were a temple of Aphrodite, and one of Artemis, situated in a grove above the town. The town is mentioned in the Tabula Peutingeriana as situated 20 miles (32 km) from Naupactus and 15 (24) from Anticyra.

The site of Oeantheia is located near modern Tolofon, although others still contend the site is near Glyfada.