Kadıköy (ˈkadɯcøj), known in classical antiquity and during the Roman and Byzantine eras as Chalcedon (Χαλκηδών), is a municipality and district of Istanbul Province, Turkey. Its area is 25 km2, and its population is 483,064 (2022). It is a large, populous, and cosmopolitan area in the Asian side of Istanbul, on the northern shore of the Sea of Marmara. It partially faces the historic city centre of Fatih on the European side of the Bosporus. One of the most expensive neighborhoods in Istanbul, Kadıköy is also the name of the most prominent neighbourhoods of the district, a residential and commercial area that, with its numerous bars, cinemas and bookshops, is the liberal cultural centre of the Anatolian side of Istanbul. Kadıköy became a district in 1928 when it was separated from Üsküdar district. The neighbourhoods of İçerenköy, Bostancı and Suadiye were also separated from the district of Kartal in the same year, and eventually joined the newly formed district of Kadıköy. Its neighbouring districts are Üsküdar to the northwest, Ataşehir to the northeast, Maltepe to the southeast, and Kartal beyond Maltepe. Chalcedon Kadıköy is an older settlement than most of those on the Anatolian side of the city of İstanbul. Relics dating to 5500-3500 BC (Chalcolithic period) have been found at the Fikirtepe Mound, and articles of stone, bone, ceramic, jewelry and bronze show that there has been a continuous settlement since prehistoric times. A port settlement dating from the Phoenicians has also been discovered. Chalcedon was the first settlement that the Greeks from Megara established on the Bosphorus, in 685 BC, a few years before they established Byzantium on the other side of the strait in 667 BC. Chalcedon became known as the 'city of the blind', the story being that Byzantium was founded following a prophecy that a great capital would be built 'opposite the city of the blind' (meaning that the people of Chalcedon must have been blind not to see the obvious value of the peninsula on the Golden Horn as a natural defensive harbour).