Key Facts
- Duration
- 750–1258 AD
- Peak area
- ~11,100,000 km²
- Ruling dynasty
- Abbasid (descended from Abbas ibn Abd al-Muttalib)
- Capital (primary)
- Baghdad (founded 762 AD)
- End event
- Mongol sack of Baghdad, 1258
Imperial Zenith Metrics
Territorial Scale Comparison
Peak area vs modern sovereign states
Historical Trajectory
Phase I: Rise
The Abbasids rose to power in 750 when the Abbasid Revolution, originating in the eastern region of Khurasan, overthrew the Umayyad Caliphate. Descended from Muhammad's uncle Abbas ibn Abd al-Muttalib, they established their government first at Kufa, then in 762 the caliph al-Mansur founded Baghdad, which rapidly grew into the political and cultural metropole of the Islamic world, drawing scholars, merchants, and administrators from across Eurasia.
Phase II: Zenith
The caliphate reached its peak prestige under Harun al-Rashid (786–809), when Baghdad hosted the House of Wisdom and became a world center of mathematics, astronomy, medicine, and philosophy. The reign fostered a multi-ethnic, multi-religious scholarly community and robust trade networks linking the Mediterranean to Central Asia. Non-Arab Muslims gained increasing inclusion in governance, and the bureaucratic vizier system gave the administration its distinctive character.
Phase III: Decline
Fragmentation accelerated through the 9th century as provinces formed autonomous dynasties including the Aghlabids, Samanids, and Tulunids. By the 10th century, the Buyids and later Seljuq Turks held real power while caliphs became figureheads. A brief revival under al-Nasir collapsed when Mongols under Hulagu Khan sacked Baghdad in 1258 and executed Caliph al-Musta'sim. A symbolic Abbasid line continued in Cairo under Mamluk patronage until the Ottoman conquest of Egypt in 1517.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory