Madytus or Madytos ( Ancient Greek: Μάδυτος) was a  Greek city and port of  ancient Thrace, located in the region of the Thracian Chersonesos, nearly opposite to Abydos.  
The city was a colony of the
Aeolians from Lesbos who, according to the ancient authors, founded also Sestos and Alopekonessos and other cities of the Hellespont. 
This was part of the Greek colonization movement of the 8th and 7th centuries BC. Later more colonists came from the Greek Ionian cities of
Miletus and Clazomenae. Archaeological evidence also supports Aeolian or possibly Athenian origin of colonists.
Madytus is tied to
Greek mythology as it claimed to have the tomb of Hecuba in its territory.
Madytus is referred by
Herodotus in relation to the Persian Wars, and by  Thucydides in relation to the Battle of the Eurymedon. It was a member of the Delian League as attested by Athenian tribute registries between 445/4 and 421/0 BC. Bronze coins dated to the fourth century BC inscribed ΜΑΔΥ have been preserved. 
Madytus was an active commercial port during the
Byzantine period and the Middle Ages. It was occupied by the  Ottoman Turks in the 15th-century. The city continued to have a mainly Greek population until the 1920s when, after the Treaty of Lausanne and the exchange of population between Greece and Turkey, most of the Greeks moved to Greece, where they founded the town of Nea Madytos.
Its site is located near the modern Eçeabat in
European Turkey.   Ptolemy mentions a town in the same district with the name of Madis, which some identify with Madytus, but which seems to have been situated more inland. 
Stephanus of Byzantium. Ethnica . s.v.
^ a b c d
Mogens Herman Hansen & Thomas Heine Nielsen (2004). "Thracian Chersonesos". An inventory of archaic and classical poleis. New York: Oxford University Press. pp. 908–909. ISBN . 0-19-814099-1
Livy. . 31.16, 33.38. Ab Urbe Condita Libri (History of Rome)
Pomponius Mela. De situ orbis. 2.2.
Anna Comnena, xiv.; Strabo. . vii. p. 331. Geographica Page numbers refer to those of Isaac Casaubon's edition.
Pseudo-Scymnus (705-10), see: Scymni Chii Periegesis. Edition S.G. Teubner, 1846, Lipsiae. p. 40, available online [my.qoop.com]
^ Benjamin H. Isaac (1986)
, Ed. E.J. Brill, Leiden, The Netherlands, p. 161. The Greek settlements in Thrace until the Macedonian Conquest
^ Loukopoulou L. (2004) Thracian Chersonesos, in M. H. Hansen & T. H. Nielsen, Eds. (2004)
, Oxford University Press, p. 900. An Inventory of Archaic and Classical Poleis
^ Herodotus of Halikarnassus,
, Book 7 (Polymnia), 30. The Histories
^ W. Heyd (1885)
, Ed. Emile Lechevauer, Paris, 1885, p. 284. Histoire du commerce du Levant au Moyen-Age
Richard Talbert, ed. (2000). . Princeton University Press. p. 51, and directory notes accompanying. Barrington Atlas of the Greek and Roman World
Lund University. . Digital Atlas of the Roman Empire
Ptolemy. . 3.12.4. The Geography
Smith, William, ed. (1854–1857). "Madytus". . London: John Murray. Dictionary of Greek and Roman Geography
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Madytus". . London: John Murray. Dictionary of Greek and Roman Geography