Title: Amīr al-Muʼminīn al-Imām al-Mustaʻṣim billāh, 640-656 H
Subjects: Abbasids, Caliphs, Biography, History
Places: Islamic Empire
People: Mustaʻṣim Billāh Caliph (ca. 1212-1258)
Time periods: 750-1258