 In the Ottoman era, it was part of the kaza of Erdek in the province of Brusa.Cyzicus, as capital of the Roman province of Hellespontus, was its ecclesiastical metropolitan see.In the "Notitiae Episcopatuum" of Pseudo-Epiphanius, composed in about 640, Cyzicus had 12 suffragan sees; Abydus, Baris in Hellesponto (between Sariköy and Biga), Dardanus, Germa in Hellesponto (ruins of Germaslu, Kirmasti, Girmas), Hadrianotherae (Uzuncia yayla), Ilium, Lampsacus, Miletopolis, Oca, Pionia (Avcılar), Poemanenum (Eskimanias), Troas.