The Dār al-Ḥikma ("House of Wisdom," called also Dār al-ʿIlm, "House of Knowledge"), was an institution of learning in Cairo, founded in 395/1005 by the Fāṭimid caliph al-Ḥākim (r. 386-411/996-1021). It was located north of the Western (or Little) Palace, facing the still extant Aqmar Mosque. The books of the palace libraries were moved there, and public lectures were held by jurists, Qurʾān readers, specialists in prophetic traditions (ḥadīth) , astronomers, grammarians, philologists, logicians, and physicians. In Ramaḍān 400/April-May 1010, al-Ḥākim