Proconnesus or Prokonnesos (Ancient Greek: Προκόννησος), also spelt Proeconesus or Proikonnesos (Προικόνησος),[1] was a Greek town on the southwestern shore of Proconnesus island. Aristeas, the poet of the Arimaspeia, was a native.[2][3] This town, which was a colony of the Milesians,[4] was burnt by a Phoenician fleet, acting under the orders of Persian king Darius I.[5] Strabo distinguishes between old and new Proconnesus. The inhabitants of Cyzicus, at a time which we cannot ascertain, forced the Proconnesians to dwell together with them, and transferred the statue of the goddess Dindymene to their own city.[6]
Under Diocletian's edict against Manichaeism, De Maleficiis et Manichaeis, offenders were sent to labor in the mines at Proconnesus.[7]
Its site is located near the town of Marmara on Marmara Island, Balıkesir Province, Turkey.[8][9]