History & background
In antiquity İznik was Nicaea, and few cities of this size have written so much church history. Founded around 316 BC by Antigonus, one of Alexander's generals, the city became the capital of the kingdom of Bithynia and, under the Romans, a flourishing trading town on the lake. In 325 Emperor Constantine convened the first ecumenical council here, which with the Nicene Creed laid the foundation of Christian dogma; in 787 the seventh council followed in the Hagia Sophia and ended the iconoclasm dispute. After Constantinople fell to the Crusaders in 1204, Nicaea was the capital of the Byzantine empire in exile for fifty years. In 1331 Orhan Gazi conquered the city, the Hagia Sophia became a mosque, and İznik enjoyed its second golden age: in the 16th century the workshops here produced the famous tiles in cobalt blue, turquoise and luminous tomato red that adorn the mosques of Istanbul and the Topkapı Palace. With the decline of the empire the craft vanished, the secret of the glazes was lost and only rediscovered in the 20th century. Today İznik is a small town of 45,000, surrounded by five kilometres of Roman and Byzantine city walls, olive groves and the lake, and is on the UNESCO World Heritage tentative list.