One of the most important historical structures of Bursa, the Ulu Mosque was built in 1399 by the Ottoman Sultan Yıldırım Bayezid. The mosque, which draws attention with its 20 domes and magnificent architecture, is also fascinating with its interior calligraphy and woodwork. The fountain in the middle of the mosque offers a different atmosphere with its unique design. One of the most beautiful examples of Islamic architecture, the Ulu Mosque is a structure that must be visited to witness the history of Bursa.