Kyzikos was established on the outskirts of Kapıdağ where the Bandırma-Erdek highway passes. The history of the region goes back to Neolithic (6th millennium BC) and Chalcolithic (5th millennium BC) period as a result of the researches conducted by Kurt Bittel. The Dolions, which settled on the slopes of Olympos (Uludağ) in Mysia, then descended to the Aisepos Plain or settled in this region from Thessalia (between Aisepos / Gönen-Kocaçay and Rindkos / Mustafa kemal Paşa-Atranos Stream), were the most old people. Therefore, this region is also called Dolionia or Dolionis. In Greek mythology, the Argonauts, who set out from Greece, stopped by Dolionia (Kyzikos) on their way to get the golden pelt that existed in Georgia (Kolkhis). King Kyzikos welcomes the Argons. They make them eat, drink and give them good food. The Argonauts set out on a storm that night and land ashore. Argonauts, who did not realize that they went back to the land of Dolonia in the darkness of night, collided with King Kyzikos and his companions as if they were enemies. However, in this battle King Kyzikos dies and after the death of Kyzikos, the city is named Kyzikos. After the death of Cyzicus, the Pelesgos of Tirrhenia invaded Cyzicus. Later in the 1200 BC, they met tribes who migrated from the Aegean and the Balkans to Anatolia.Kyzikos, which was a colony of Miletus (Söke-Balat Village), which was one of the most important Ionian cities for a while, was founded by the city of Lydia. With the collapse of Kyros in 546, it was under Persian rule. B.C. Kyzikos gained independence in 364 BC. With the defeat of Persians by Alexander the Great in 334, the Macedonians came under the rule. B.C. Kyzikos gained great importance in the 3rd century BC due to its location on the trade routes in the Sea of ​​Marmara. In the 2nd century BC, it entered into good relations with Bergama and became a center of science and culture. When Pergamon came into the hands of the Romans, Kyzikos, who had good relations with Pergamon, became friends with the Romans, but later came under the sovereignty of the Romans. When Constantine made Byzantion the capital of the Eastern Roman Empire in 3224 AD, Cyzicus first dulled and then slowly faded. The Byzantine encircled by strong walls prevented certain dangers from the north. However, invasions from other directions have always passed through Cyzicus and hastened its destruction. A.D. 7.-8. In the centuries, Cyzicus was no longer the center of administrative or military division. Like many of the provincial mints, the beautiful moth Kyzikos, whose mint had been abandoned, the passage in the basin filled up, and some of its walls and buildings had been demolished, remained open to all raids through Constantinople. Earthquakes and invasions chasing each other brought Kyzikos out of his seat.The nearby city of Arteke (Erdek), which is an excellent natural harbor due to the filling of ports that require cleaning and maintenance, gradually replaced Kyzikos in terms of shipping and port activities. However, he could not show an existence because he was highly damaged by earthquakes and raids. Both the Arabs who came to Kyzikos to conquer Istanbul, and Kyzikos, which was damaged due to earthquakes, were completely destroyed as a result of the terrible earthquake that took place on 23 September 1063. The survivors began to leave the city. The berzah connecting the Kapidag Peninsula to the mainland was a trade city famous for its three harbors, the Hadrian Temple and the amphitheater, and a colony of wine, olive oil, wheat, marble and perfumery before it expired. Three major earthquakes, filling the harbor in the berth, and the swamp causing malaria caused the people to migrate to Erdek today. The earthquakes caused this city in the splendor of Ephesus to be left to the unknown.