The Great Mosque of Djenne is a famous mosque located in the city of Djenne, Mali. It is one of the largest mud-brick buildings in the world and is a prime example of Sudano-Sahelian architecture. The mosque was originally built in the 13th century and has been rebuilt several times, with the current structure completed in 1907. The mosque is made from adobe, a mixture of clay and straw, which helps it withstand the hot climate. It features three large towers and is adorned with wooden beams called toron, which are used for maintenance and decoration. The mosque is a UNESCO World Heritage site and serves as a center for Islamic learning and community gatherings.