The Djenne Mosque, located in Djenne, Mali, is one of the largest mud-brick structures in the world. Built in 1907, it is a prime example of Sudano-Sahelian architecture, characterized by its use of adobe and wooden beams. The mosque serves as a central place of worship for the local Muslim community and is a UNESCO World Heritage site. The mosque is renowned for its impressive façade, featuring three large towers and numerous wooden pillars. Each year, the local community participates in a festival called the Crepissage, where they repair and maintain the mosque's exterior, ensuring its preservation for future generations.