View source for Cyzicus

===Medieval===
Cyzicus was [[First Arab Siege of Constantinople|captured temporarily]] by the Arabs led by [[Muawiyah I]] in AD 675. It appears to have been ruined by a series of earthquakes beginning in 443, with the last in 1063. Although its population was transferred to [[Artake]] before the 13th century when the peninsula was occupied by the [[Fourth Crusade|Crusaders]],{{sfn|Hasluck|1911}} in 1324 the metropolitan of Cyzicus was one of three sees in Anatolia which was able to contribute a temporary annual subsidy to the Patriarchate of Constantinople. Following its conquest by the Ottomans it underwent hard times. From a point between 1370 and 1372 until 1387, the metropolitan was empty; Speros Vryonis speculates this was due to financial difficulties. Later in the 14th century, the sees of [[Chalcedon]] and certain patriarchal possessions in Bithynia and Hellespont were bestowed on the metropolitan of Cyzicus.<ref>Vryonis, ''The Decline of Medieval Hellenism in Asia Minor and the Process of Islamization from the Eleventh through the Fifteenth Century'' (Berkeley: University of California, 1971), pp. 299f</ref>

In the [[Ottoman Empire|Ottoman era]], it was part of the [[kaza of Erdek]] in the [[Brusa Vilayet|province of Brusa]].