
Bursa Grand Mosque, or Ulu Cami'i, is a monumental structure in Bursa, Turkey, that exemplifies the grandeur of early Ottoman architecture. Constructed between 1396 and 1399 during the reign of Sultan Bayezid I, it stands as one of the most significant mosques of the Ottoman Empire, showcasing the architectural transition from the Seljuk style to what would become known as classical Ottoman architecture.

The mosque's layout is particularly notable for its 20 domes, which are strategically arranged in four rows of five. This design is not just architecturally striking but also ingeniously distributes weight and supports the structure's extensive ceiling. The dual minarets add to its majestic silhouette, enhancing its prominence within the city's skyline.
Inside, the mosque is supported by 12 massive columns, creating a spacious and awe-inspiring interior. However, what truly sets Bursa Grand Mosque apart is its extensive use of Islamic calligraphy. The walls and pillars of the mosque are adorned with 192 samples of exquisite calligraphy by 41 different calligraphers. This collection is one of the most important in the world, representing a wide range of styles and epochs in Islamic art. Each piece of calligraphy adds a layer of beauty and spiritual depth, turning the mosque into a veritable gallery of Islamic art.
Moreover, the mosque features a centrally located fountain that was originally used for ritual ablutions. This fountain is now symbolic, adding an element of tranquility to the atmosphere of the mosque.
Today, Bursa Grand Mosque remains a vital center of worship and a major attraction for visitors and scholars alike, who come to admire its architectural significance and its rich repository of Islamic calligraphy. It plays a pivotal role in the cultural and spiritual life of Bursa, reflecting the city’s historical importance as the first major capital of the Ottoman Empire.
