Just outside the medina walls, within the confines of an extensive cemetery, is the mosque and mausoleum of one of Morocco's most famous saints, Sidi Mohammed ben Aïssa (aka Cheikh El Kamel, 1467–1526). He founded the legendary Aïssaoua Sufi brotherhood, and each year his followers come from all over North Africa to gather at the shrine at the annual moussem (festival) on the eve of the birth of the prophet Mohammed. The festival date varies with the lunar calendar, but expect processions through Meknès, the brotherhood’s singular music, and ecstatic dances, often imitating animals. Ben Aïssa was said to have made a pact with the animal world and to possess magical powers, such as the ability to transform leaves into gold and silver coins. The brotherhood was once known for such voluntary rituals as swallowing scorpions, broken glass, and poison; members also mutilated themselves with knives in prayer-induced trances. Entry to the mausoleum is restricted to Muslims.