Founding of the Fatimid Caliphate in Ifriqiya under al-Mahdi Billah (909–934)

  1. Al-Mahdi acclaimed caliph by Kutama troops

    Labels: Al-Mahdi, Kutama, Sijilmasa

    In August 909, ʿUbayd Allāh was acclaimed caliph by the Kutama forces at Sijilmasa, a pivotal step in transforming an underground missionary movement into a proclaimed caliphate.

  2. Al-Mahdi enters Raqqada and proclaims caliphate

    Labels: Al-Mahdi, Raqqada, Fatimid Caliphate

    Al-Mahdi arrived in Ifriqiya and, upon entering Raqqada, publicly proclaimed himself caliph with the regnal title al-Mahdī bi-llāh, a foundational moment for the Fatimid Caliphate’s legitimacy and administration.

  3. Al-Mahdi begins selecting a new coastal capital

    Labels: Al-Mahdi, Kairouan, Coastal capital

    By 912, al-Mahdi began seeking a more secure and strategically positioned capital on the coast, partly to reduce tensions with the predominantly Sunni inland center of Kairouan and to strengthen maritime defense.

  4. Construction of al-Mahdiyya and its Great Mosque begins

    Labels: Al-Mahdiyya, Great Mosque, Palace city

    Construction began on the fortified palace city al-Mahdiyya (Mahdia) in 916, alongside the initiation of its congregational Great Mosque, anchoring the dynasty’s new political-military center on the Mediterranean coast.

  5. Al-Mahdi dies; succession of al-Qa'im

    Labels: Al-Mahdi, Al-Qa'im, Mahdiyya

    Al-Mahdi died at Mahdiyya on 4 March 934; he was succeeded by his son al-Qāʾim bi-Amr Allāh, marking the end of the founding caliph’s reign and the transition to the next phase of Fatimid expansion and consolidation.

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Last Updated:Jan 1, 1980

Founding of the Fatimid Caliphate in Ifriqiya under al-Mahdi Billah (909–934)