Key Facts
- Duration
- 1744 – 1818
- Official name
- Emirate of Diriyah
- Founding pact
- Agreement between Muhammad bin Saud and Ibn Abd al-Wahhab
- Territory at peak
- Most of the Arabian Peninsula
- Founding year
- 1744
Imperial Zenith Metrics
Historical Trajectory
Phase I: Rise
In 1744, Muhammad bin Saud Al Muqrin, emir of the Najdi town of Diriyah, formed a pact with the religious reformer Muhammad ibn Abd al-Wahhab. This alliance fused political authority under the House of Saud with the propagation of Wahhabi doctrine, providing both military legitimacy and religious motivation for rapid expansion across the Arabian Peninsula from a small desert principality.
Phase II: Zenith
At its height, the First Saudi State controlled most of the Arabian Peninsula, including the Hejaz and the holy cities of Mecca and Medina, which it captured in 1803–1806. This territorial dominance allowed the enforcement of Wahhabi religious standards across vast regions and challenged Ottoman suzerainty over Islam's most sacred sites, marking the state's greatest political and religious influence.
Phase III: Decline
The Ottoman Empire commissioned Muhammad Ali of Egypt to suppress the Saudi-Wahhabi state. Egyptian forces under Ibrahim Pasha systematically dismantled Saudi power, besieging and destroying the capital Diriyah in 1818. The last Saudi ruler, Abdullah bin Saud, was captured and executed in Constantinople. This military defeat ended the First Saudi State, though the House of Saud later re-emerged to found successor polities.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory