This volume complements the selections of Wilferd Madelung’s articles previously published by Variorum (Religious Schools and Sects in Medieval Islam, Religious and Ethnic Movements in Medieval Islam and Studies in Medieval Shīism). The first sections contain articles examining intellectual and historical aspects of Mutazilism, the Ibāḍiyya, Ḥanafism and Māturidism, Sufism and Philosophy. The final group of articles focuses on aspects of early Muslim history. A detailed index completes the volume.