Selim I conquers the Mamluk Sultanate and claims religious primacy
A decisive campaign against Egypt doubles Ottoman territory and puts Mecca, Medina, and Jerusalem under the sultan's protection.
Quick facts
- Sultan
- Selim I (r. 1512-1520)
- Decisive battle
- Ridaniya, 22 January 1517
- Territory gained
- Egypt, Syria, Palestine, Hejaz
- Caliphate claim
- First recorded as a formal transfer story in the 1790s, not in 1517
What happened
Sultan Selim I, having already defeated the Safavid Shah Ismail I at Chaldiran in 1514, turned south against the Mamluk Sultanate of Egypt, Syria, and the Hejaz. Ottoman forces defeated the Mamluks at Marj Dabiq in August 1516 and again at Ridaniya near Cairo on 22 January 1517, bringing Egypt, Syria, Palestine, and the holy cities of Mecca and Medina under Ottoman control. Selim took custody of the last Abbasid caliph, al-Mutawakkil III, who had lived in Cairo as a Mamluk figurehead, and brought him to Constantinople. A later tradition, first recorded in the 1790s by the Swedish orientalist Ignatius Mouradgea d'Ohsson, claimed al-Mutawakkil formally transferred the title of caliph to Selim in a ceremony, but historian Hakan Karateke's review of Selim's own contemporary correspondence finds no mention of any such transfer; Selim's letters describe himself only as acting with the caliph's authorization, not as caliph himself.
Why it matters
The conquest roughly doubled Ottoman territory in under a decade and gave the sultans control over the pilgrimage routes to Mecca and Medina, which they used afterward as a central source of religious legitimacy across the Muslim world. Whether or not a formal transfer of the caliphate ever happened, later Ottoman sultans increasingly presented themselves as caliphs, and by the 18th and 19th centuries the claim to universal Islamic leadership had become central to Ottoman self-presentation.
How we know
Karateke's academic paper for the University of Chicago traces Selim's own letters, including his correspondence with his son Suleiman announcing the conquest, and finds the title of caliph absent from them, concluding the transfer story was a later invention with no contemporary support. This event is marked debated because the popular narrative of a formal caliphate transfer in 1517 remains widely repeated despite the absence of supporting evidence from Selim's own reign.
Sources
- Hakan T. Karateke, University of Chicago. Legitimizing the Ottoman Sultanate: A Framework for Historical Analysis · Peer-reviewed (author-declared)lucian.uchicago.edu · Cited as a "journal" source (no stronger domain match).
- World History Encyclopedia. Ottoman Empire · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
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