The Moroccan mystic and theologian Aḥmad b. Idrīs (1749-1837) was one of the most dynamic personalities in the Islamic world of the 19th century. Through his teachings and the activity of his students important Sufi orders were founded which exerted wide-ranging social and political influence, orders such as the Sanūsiyya in Libya and the Khatmiyya in the Sudan. To date, publications dealing with him have especially focused on his...