|• Mayor||İsmail Avcu (AKP)|
|• District||1,028.50 km2 (397.11 sq mi)|
|• District density||48/km2 (120/sq mi)|
Bigadiç is a town and district of Balıkesir Province in the Marmara region of Turkey. Bigadiç has the largest Boron reserves of both Turkey and the World. Also, villages of Bigadiç have natural thermal water reserves which contains Selenium and Sulfur.
The oldest known name of Bigadiç is ancient Greek Achyraos or Achyraus (Αχυράους in Ancient Greek), during the Byzantine era Pegadia (Πηγάδια), which means "wells", from which it evolved to Begadia, to Begados, and eventually to the Turkishized name Bugadıç. Some support the theory that the name "Boğadıç" means "Bull meadow" ("Boğa" is the Turkish translation of the English word "Bull").
Ancient Achyraus, also known as Adrianothera, was situated in the Roman province of Hellespontus, whose capital and metropolitan see was Cyzicus. Four bishops described as of Adrianothera are known because of their participation in church councils: Patricius in the Council of Chalcedon (451); Cyprianus in the Second Council of Constantinople (553); Basilius in the Second Council of Nicaea (787); and Gregorius in the Photian Council of Constantinople (879). Adrianothera is the name that appears in Notitiae Episcopatuum until the 10th century; but Achyraus from the 11th to the 13th century. Two 13th-century bishops of this latter period are known: Leo and Laurentius. No longer a residential bishopric, Achyraus is today listed by the Catholic Church as a titular see.
- Falling Rain Genomics, Inc. "Geographical information on Bigadiç, Turkey". Retrieved 2008-10-22.
- "Area of regions (including lakes), km²". Regional Statistics Database. Turkish Statistical Institute. 2002. Retrieved 2013-03-05.
- "Population of province/district centers and towns/villages by districts - 2012". Address Based Population Registration System (ABPRS) Database. Turkish Statistical Institute. Retrieved 2013-02-27.
- Gustav Parthey, Synecdemus et notitiae Graecae episcopatuum (A. M. Hakkert, 1967 reprint), p. 332
- Sophrone Pétridès, v. Achyraus, in Dictionnaire d'Histoire et de Géographie ecclésiastiques, vol. I, Paris 1909, col. 333
- Michel Lequien, Oriens christianus in quatuor Patriarchatus digestus, Paris 1740, Vol. I, coll. 771-772
- Annuario Pontificio 2013 (Libreria Editrice Vaticana 2013 ISBN 978-88-209-9070-1), p. 823
- District governor's official website (Turkish)
- Turkish Statistical Institute's official website (English)
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