The development in the art of ceramic tiling in İznik, can be easily understood from the tile coverings on the historical structures of which construction dates are known. Having been built between 1378 and 1391, the İznik Green Mosque with its oldest Ottoman tiles which decorates its minaret continued the Seljuk tradition in aspects of technique and decor, but the colors and tints are richer than the ones of the Seljuk's. 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 center of the ceramics, known as Milet, Damascus group and Rhodes work, is İznik. The great traveler Evliya Çelebi, who visited İznik in the 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 on the İznik Tiles as well as humans, animals such as bird, rabbit, dog and ship figures. The most used colors are blue, turquoise, green and red.