Chariopolis or Charioupolis (Greek: Χαριούπολις), modern Hayrabolu in European Turkey, was a residential bishopric of the Patriarchate of Constantinople during the Byzantine Empire (8th–14th centuries).
[1][3] In the 11th century, a bishop Michael is known through his seal; from the decoration it appears that he may have previously been a member of the clergy of the Hagia Sophia in Constantinople.
[1] In 1305 or 1306, an unnamed bishop of Chariopolis attended a synod called by Patriarch Athanasius I of Constantinople to condemn John Drimys.
[2][4] In 1347, the subordination of the bishopric of Chariopolis, which apparently had been vacant since the start of the Byzantine civil war of 1341–1347, to Heraclea was formally renewed by imperial prostagma.
[5] Since the 19th century, the title of Bishop of Chariopolis has been assigned to vicar bishops of the Patriarchate of Constantinople: The Roman Catholic Church established "Chariopolis" (until 1925 "Cariopolis", in Italian: Cariopoli), as an episcopal titular see in the early 18th century,[6] and still lists it as a titular see.