It was built during the reign of sultan Sidi Mohammed Ben Abdellah around 1785. The building is characterized by its large dimensions, perfect regularity and extreme simplicity. The prayer hall is divided into three large 700 m wide naves, parallel to the Qibla wall. Very thin horseshoe arches rest on square pillars and support barchelas covered with green tiles. A regular rectangular courtyard occupies the western part. Decorated with two pavilions reminiscent of those of Al-Qarawiyin mosque in Fez, it provides permanent ventilation and light in the oratory.