Bursa al-Kabir mosque or Oulu Jemaa is the largest mosque in Bursa city. It was built by the Ottoman Sultan Beyazid I and was built between 1396 and 1400 AD. The mosque covers an area of ​​5000 square meters and is considered a unique architectural piece built in the famous Ottoman style. Ali Nassar was ordered by Sultan Beyazid I, a huge rectangular building. The mosque has two minarets and twenty domes arranged in four rows and in each row five domes supported by 12 columns. The first Sultan Beyazid had vowed to build twenty mosques if he won the battle of Nicopolis. The reason is to make the mosque contains twenty In the center of the mosque is a water fountain used for ablution and above the fountain is a fountain to introduce the natural light of the mosque

There are 192 beautiful inscriptions inside the mosque, which were drawn by the most famous Ottoman calligraphers in the era. These paintings are located on walls and columns spread throughout the mosque,

The mosque is located in the center of the city of Bursa in what is now the covered market. It overlooks Atatürk Caddesi Street, which is about 1.5 km away from the Kent complex. It is accessible by tram T1 which starts from Beside Othman Ghazi Metro Station