Iznik , formerly Nicaea , is a town and an administrative district in the Province of Bursa, Turkey. The town lies in a fertile basin at the eastern end of Lake iznik, bounded by ranges of hills to the north and south. As the crow flies the town is only 90 km southeast of Istanbul but by road it is 200 km around the Gulf of Izmit. It is 80 km by road from Bursa.
Green Mosque (Yesil Cami) (1378–1371). The mosque was built for Çandarl? Kara Halil Hayreddin Pasha, the first Grand Vizier of the Ottoman Empire. It is located near the Lefke Gate on the east side of the town. It was damaged in 1922 during the Greco-Turkish War and restored between 1956 and 1969