al-Mustansir (Cairo)

Type Figure Region Egypt Time 1210–1261 Also known as Al-Mustansir、Al-Mustansir II、al-Mustansir bi'llah、Al-Mustansir (Cairo)

An Abbasid caliph in Cairo, Egypt; installed by Mamluk sultan Baybars in 1260 after the Mongol sack of Baghdad to uphold Islamic religious orthodoxy,…

Timeline

1258–1260Cairo · EgyptAfter the Mongols destroyed Baghdad in 1258 and the last Baghdad caliph al-Musta'sim was killed, some Abbasid royals fled to Mamluk Egypt; al-Mustansir, as a descendant of the royal family, awaited a chance to succeed in Cairo.
1260–1261Cairo · CairoAfter Mamluk sultan Baybars defeated the Mongols at Ain Jalut in 1260, he installed al-Mustansir as caliph in Cairo, granting him symbolic religious authority to counter the Mongols and regional separatists; his real power was limited, with government controlled by the Mamluk sultan.

Sources

Abbasid Caliphate https://www.britannica.com/topic/Abbasid-caliphate
The Mamluk Sultanate and the Caliphate — Peter M. Holt (1986)