Abu Ali al-Mansur, better known by his regnal name al-Hakim bi-Amr Allah, was the sixth Fatimid caliph and 16th Ismaili imam (996–1021). Al-Hakim is an important figure in a number of Shia Ismaili sects, such as the world's 15 million Nizaris and 1–2 million Musta'lis, in addition to 2 million Druze.

The House of Wisdom, also known as the Grand Library of Baghdad, was believed to be a major Abbasid-era public academy and intellectual center in Baghdad. In popular reference, it acted as one of the world's largest public libraries during the Islamic Golden Age, and was founded either as a library for the collections of the fifth Abbasid caliph Harun al-Rashid in the late 8th century or as a private collection of the second Abbasid caliph al-Mansur to house rare books and collections of poetry in the Arabic and Persian language. During the reign of the seventh Abbasid caliph al-Ma'mun, it was turned into a public academy and a library.