Ulu Cami, also known as the Grand Mosque, is an iconic landmark situated in Bursa, Turkey. It represents a significant piece of Ottoman Turkish architecture and holds great historical and cultural value. Constructed between 1396 and 1400 upon the order of Sultan Bayezid I, it is one of the largest mosques in Turkey, boasting 20 domes and 2 minareths. The architectural design reflects a synthesis of Seljuk and Ottoman styles, and the interior is famously adorned with 192 monumental wall inscriptions by various calligraphers. The mosque features a vast prayer hall and contains a fountain (şadırvan) where worshipers perform ritual ablutions before prayer. The Grand Mosque is revered for its simplicity, grandeur, and artistry, which includes intricate Islamic calligraphy and decorations. It is also known for having a unique aesthetic with 20 domes spread over a rectangular prayer hall, creating a calm and spacious environment for reflection and worship. Ulu Cami remains an active place of worship and a must-visit tourist attraction in Bursa, offering visitors a deep insight into the history of the Ottoman Empire and Islamic art and culture.