The Canadian Encyclopedia — neutral, cited, updated
July 26, 2026Sources cited
Canadianwire.
Canada’s encyclopedia & explainer
HomePolitics & WorldHistoryFall of Constantinople
Politics & World • History

Fall of Constantinople

The Fall of Constantinople was the capture of Constantinople, the capital of the Byzantine Empire, by the Ottoman Empire on 29 May 1453 after a siege that began on 6 April 1453.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The Fall of Constantinople was the capture of Constantinople, the capital of the Byzantine Empire, by the Ottoman Empire on 29 May 1453 after a siege that began on 6 April 1453. It is widely treated as the event that ended the Byzantine Empire and is often cited as a major turning point in European and Near Eastern history.

Background

Constantinople had long been the capital of the Byzantine Empire and one of the most fortified cities in the world. By the mid-15th century, the empire had shrunk considerably and was vulnerable to Ottoman expansion.

Siege and capture

Ottoman forces under Mehmed II besieged the city from 6 April to 29 May 1453. The defenders resisted behind the Theodosian Walls, but Ottoman artillery and repeated assaults eventually breached the city’s defences. The final assault on 29 May ended with the Ottoman capture of Constantinople.

Aftermath

Following the conquest, Constantinople became the main Ottoman political centre. The capture marked the end of Byzantine imperial rule and had major consequences for trade, diplomacy, and migration in Europe and the eastern Mediterranean. Constantinople later became the Ottoman capital and is now known as Istanbul.

Historical significance

The fall of Constantinople is often described as one of the major turning points of the late medieval period. It is associated with the end of the Byzantine Empire and the expansion of Ottoman power into southeastern Europe. The event is studied in Canadian history and world history courses as a major turning point at the end of the Middle Ages and the start of Ottoman dominance in southeastern Europe. It also matters for understanding the movement of Greek scholars and texts into western Europe, which is often linked to Renaissance intellectual history. The fall of Constantinople is often compared to other major historical turning points such as the French Revolution and the Thirty Years' War, and its impact is sometimes contrasted with that of the Russian Revolution.

Key facts

  • The city was captured by the Ottoman Empire on 29 May 1453 after a prolonged siege.
  • The siege began on 6 April 1453 and ended with a final assault that breached the city’s defences.
  • Mehmed II led the Ottoman forces, while Constantine XI Palaiologos led the Byzantine defence.
  • The event ended the Byzantine Empire and is commonly linked to the end of the Eastern Roman Empire.
  • The fall is regarded as a major turning point in the history of Europe and the eastern Mediterranean.
🍁
Canadian context

The event is studied in Canadian history and world history courses as a major turning point at the end of the Middle Ages and the start of Ottoman dominance in southeastern Europe. It also matters for understanding the movement of Greek scholars and texts into western Europe, which is often linked to Renaissance intellectual history.

Frequently asked questions

When did the Fall of Constantinople happen?
It occurred on 29 May 1453, after a siege that began on 6 April 1453.
Who captured Constantinople?
The Ottoman Empire captured the city under Sultan Mehmed II.
Who defended Constantinople?
The Byzantine defence was led by Emperor Constantine XI Palaiologos.
Why is the event important?
It marked the end of the Byzantine Empire and became a major turning point in European and eastern Mediterranean history.
What happened to Constantinople after the capture?
It became an Ottoman city and later served as the Ottoman capital.

References

  1. Wikipediahttps://en.wikipedia.org/wiki/Fall_of_Constantinople
    Supports: Date of capture, siege start date, and general identification of the event.
  2. Encyclopaedia Britannicahttps://www.britannica.com/event/Fall-of-Constantinople-1453
    Supports: Date, Ottoman conquest under Mehmed II, siege context, and historical significance.
  3. EBSCO Research Startershttps://www.ebsco.com/research-starters/history/fall-constantinople
    Supports: Date and significance as the end of the Byzantine Empire.
  4. Lumen Learninghttps://courses.lumenlearning.com/atd-herkimer-westerncivilization/chapter/the-fall-of-constantinople/
    Supports: Date, siege duration, and aftermath including transformation into Ottoman capital.