All events · Conquest and the Slave Trades

The Fall of Constantinople and the Ottoman Repopulation of the City

1453–1478 · Balkans, Anatolia & the Caucasus

Displacement Territory Seized Mass Killing

Displaced

60,000

The figures come from narrative sources, not registers. Byzantine and Ottoman chroniclers of the siege (Doukas, Kritovoulos, Sphrantzes, Leonard of Chios) put the city's population before the siege at 40,000-50,000, far below its medieval peak, and describe some 4,000 killed and roughly 50,000 survivors enslaved or ransomed; these are round numbers written for effect. The repopulation is better evidenced: Mehmed ordered families deported (surgun) from Anatolia and Rumelia, Muslim, Christian and Jewish alike, and the survey of 1477-78 counts about 16,300 households in the city, implying perhaps 60,000-70,000 residents a quarter-century after the conquest. The number moved under compulsion cannot be separated cleanly from voluntary settlement.

Share of the population affected

1.3×

of the population of Constantinople on the eve of the Ottoman siege, 1453

Killed

4,000

direct killing

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What happened

Constantinople fell on 29 May 1453 after a seven-week siege, and by the custom of the day a city taken by storm was given over to plunder; the chroniclers describe three days of sack in which churches were stripped, thousands were killed and the bulk of the surviving population was enslaved, with the wealthier ransomed. Mehmed II then set about restoring the city as an imperial capital, issuing orders that brought settlers from all over the empire, some by inducement and many by surgun, the compulsory transfer of designated households. Muslims from Anatolia, Orthodox Christians from Rumelia and the Aegean, Armenians and Jews were installed by quarter, a pattern repeated at Trebizond, Karaman and elsewhere as new territories were absorbed. The 1477-78 survey shows a city of roughly 16,300 households, restored in size but wholly recomposed. The killing and enslavement figures rest on partisan narrative accounts and are not verifiable; the transfer policy is documented in Ottoman administrative records and surveys.

Parties

Mehmed II took Constantinople, allowed a three-day sack in which the surviving inhabitants were enslaved, then repopulated the city by compulsory transfer of families from across the empire

Disputed

The number killed and enslaved in the 1453 sack rests entirely on chroniclers with strong confessional interests, and historians disagree on how much of the city's later population arrived by compulsion rather than by the tax exemptions and property grants Mehmed also offered.

The denominator

Steven Runciman and subsequent scholarship estimate 40,000-50,000 inhabitants in 1453, a remnant of a city that had held several hundred thousand before the Fourth Crusade of 1204; large parts of the walled area were by then fields and ruins. The surrendered towns and the compulsory transfers of 1453-78 brought in populations from across the Balkans and Anatolia.

The 60,000 figure spans both the enslavement of the city's inhabitants in 1453 and the compulsory resettlement of people brought in from elsewhere, who were never part of this denominator.

Where the baseline comes from

Fall of Constantinopleopen-edited
Constantinopleopen-edited

On the death toll

The figure of about 4,000 killed during the assault and sack comes from the eyewitness and near-contemporary chroniclers of the siege and is the only number in circulation; it is a chronicler's estimate, not a count, and no modern reconstruction has been able to test it. Deaths among those enslaved and dispersed afterwards are unrecorded.

Documented forms of violence

Mass KillingForced LabourDestruction of PropertyCultural Destruction

The killing and mass enslavement during the three-day sack, the plunder of churches including Hagia Sophia, and the compulsory transfer of households under surgun are described by the Byzantine and Italian chroniclers of the siege and by Ottoman administrative sources respectively.