Cynus (Ancient Greek: Κῦνος, romanized: Kynos) was the principal sea-port of the Opuntian Locrians, situated on a cape at the northern extremity of the Opuntian Gulf, opposite Aedepsus in Euboea, and at the distance of 60 stadia from Opus. Livy gives an incorrect idea of the position of Cynus, when he describes it as situated on the coast, at the distance of a mile from Opus. Cynus was an ancient town, being mentioned in the Homeric Catalogue of Ships in the Iliad. It was reported to have been the residence of Deucalion and Pyrrha; the tomb of the latter was shown there. Beside Livy and Homer, Cynus is mentioned by other ancient authors, including Strabo, Pomponius Mela, Pliny the Elder, and Ptolemy.
Colonists from Cynus founded Autocane in Aeolis, situated opposite the island of Lesbos. It was one of the places that suffered the destruction caused by a tsunami that took place after an earthquake in 426 BCE. In 207 BCE, during the First Macedonian War, Cynus, which appears defined as an emporium of Opus, was the place to which the fleet of Publius Sulpicius Galba Maximus retired after failing in its attack against Chalcis.
Its site is marked by a tower, called Paleopyrgo (or Pyrgos), and some Hellenic remains, about a mile to the south of the village of Livanates. The archaeological site is thus also referred to as Pyrgos Livanaton. The site was excavated between 1985 and 1995 by the 14th Ephorate of Prehistoric and Classical Antiquities in Lamia. The findings of these excavations have so far only been made known in preliminary reports, but archaeologists have found items from the Bronze and Early Iron Age.
- Stephanus of Byzantium. Ethnica. Vol. s.v.
- Strabo. Geographica. Vol. ix. p.425. Page numbers refer to those of Isaac Casaubon's edition.
- Pausanias. Description of Greece. Vol. 10.1.2.
- Livy. Ab Urbe Condita Libri [History of Rome]. Vol. 28.6.
- Homer. Iliad. Vol. 2.531.
- Strabo. Geographica. Vol. i. p.60, ix. p. 446, xiii. p. 615. Page numbers refer to those of Isaac Casaubon's edition.
- Pomponius Mela. De situ orbis. Vol. 2.3.
- Pliny. Naturalis Historia. Vol. 4.7.12.
- Ptolemy. The Geography. Vol. 3.15.10.
- Strabo. Geographica. Vol. 13.1.68. Page numbers refer to those of Isaac Casaubon's edition.
- Strabo. Geographica. Vol. 1.3.20. Page numbers refer to those of Isaac Casaubon's edition.
- Richard Talbert, ed. (2000). Barrington Atlas of the Greek and Roman World. Princeton University Press. p. 55, and directory notes accompanying.
- Lund University. Digital Atlas of the Roman Empire.
- See e.g. Ph. Dakoronia, 'The Transition from Late Helladic IIIC to the Early Iron Age at Kynos.', in LHIIIC Chronology and Synchronisms. Proceedings of the international workshop held at the Austrian Academy of Sciences at Vienna, May 7th and 8th, 2001, ed. S. Deger-Jalkotzy and M. Zavadil, Vienna 2003, pp. 37–51, with earlier references.