The development in the art of ceramic tiling in İznik, can be easily understood from tile coverings on historical structures of which construction dates are known. Having been built between 1378 and 1391, İznik Green Mosque with its oldest Ottoman tiles which decorates its minaret continued the Seljuk tradition in aspects of technique and decor, but the colours and tints are richer than the ones of the Seljuks. The diversity of green and turquoise ceramic tiles of the Mosque attracts attention.
According to the historical records, the ceramic tiles used in the constructions of İstanbul were produced in İznik. The centre of the ceramics known as Milet, Damascus group and Rhodes work is İznik. The great traveller Evliya Çelebi, who visited İznik in 17th century, has mentioned in his book that there were more than 300 tile kilns in İznik. Flower motifs such as tulip, hyacinth, pomegranate and clove were used in İznik Tiles as well as human, animal such as bird, rabbit, dog and ship figures. The most used colours are blue, turquoise, green and red.