Bursa Grand Mosque (Turkish: Ulu Cami) is a mosque in Bursa, Turkey. Built in the Seljuk style, it was ordered by the Ottoman Sultan Bayezid I and built between 1396 and 1399 CE. The mosque has 20 domes and 2 minarets.
circa 1399 CE
The inner fountain (şadırvan) inside the mosque where worshipers can perform ritual ablutions before prayer; the dome over the şadırvan is capped by a skylight which creates a soft light below, playing an important role in the illumination of the large building.