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Mehmed II in AP World History: Modern

Mehmed II, known as "the Conqueror," was the Ottoman sultan (r. 1444-1446 and 1451-1481) who captured Constantinople in 1453 with the help of large gunpowder cannons, ending the Byzantine Empire. He made the city his capital and used it to build a more centralized empire, increasingly run by officials and soldiers trained to serve the sultan.

This definition is part of Fiveable's AP World History: Modern review, which also has guided practice questions.

Verified for the 2027 AP World History: Modern exam•Last updated November 2026•Fiveable Content Team

Mehmed took the city, Suleiman ran the empire at its height

If an answer choice credits the sultan who captured Constantinople in 1453 with besieging Vienna in 1529, it has merged Mehmed II with Suleiman the Magnificent (r. 1520-1566). Mehmed is the mid-1400s conqueror who turned the Ottomans from a strong regional state into an empire centered on Constantinople. Suleiman ruled about a century later, pushed into Hungary, besieged Vienna in 1529, and is remembered in Ottoman tradition as "the Lawgiver."

A quick test helps. If a question mentions 1453, the end of Byzantium, or the conversion of Hagia Sophia, it's Mehmed. If it points to the empire's peak, the siege of Vienna, or rivalry with the Habsburgs in the 1500s, it's Suleiman.

A second slip is treating 1453 as the start of the Ottoman state. The Ottomans had been expanding since around 1300 and already held much of the Balkans and Anatolia. The conquest gave them a world-famous capital and a stronger claim to imperial rule.

Turning a conquest into a claim to rule

Mehmed fits Topic 3.2: Empires: Administration in Unit 3, which asks how rulers from 1450 to 1750 justified their power and tightened control over people and resources. He's a useful case because he used several of the course's methods at once.

On religion and monuments, he converted the Hagia Sophia, the great Byzantine church, into a mosque, which signaled that Islam and the Ottoman dynasty now held the city. He also began the Topkapı Palace as the seat of government. On imperial identity, he took the title Caesar of Rome (Kayser-i Rum), presenting himself as heir to the Roman and Byzantine emperors as well as a Muslim ruler.

He also had to run a city full of non-Muslims. He resettled Istanbul with Greeks, Armenians, Jews, and Muslims, and he appointed a Greek Orthodox patriarch to lead the Orthodox community. That fits a broader Ottoman pattern of governing religious communities through their own leaders. Avoid saying Mehmed created a formal "millet system," because historians debate how organized that system was this early.

Devshirme officials and Janissaries as the sultan's own people

The essential knowledge for 3.2 mentions rulers relying on elite bureaucrats and career military specialists. For the Ottomans, the illustrative example is the devshirme, which took Christian boys from Balkan villages, converted them to Islam, and trained them as Janissary soldiers or palace administrators.

Mehmed didn't invent the devshirme or the Janissaries, which existed before him. He did lean on devshirme-trained men to staff the top of his government, including the office of grand vizier. That cut the power of older Turkish noble families, who had their own land and followers.

Devshirme recruits were separated from their birth families and trained for service to the sultan, so they had fewer ties to the established Turkish noble families. Once in office, they could still build households and networks of their own. Even so, relying on men whose careers came from palace training helped Mehmed build a more centrally controlled administration, and that's the centralizing move the course is looking for.

If you're asked how Ottoman rulers raised revenue, use Ottoman tax farming, a separate illustrative example. Mehmed isn't the standard example there, so don't attribute it to him specifically.

Using Mehmed as evidence in a 3.2 essay or SAQ

Mehmed II isn't named in the illustrative example list, so he isn't a named example you need to memorize from that list. An exam question could still feature him, though, and he works well as specific evidence for the 3.2 skills of causation and comparison.

In multiple choice, expect a stimulus such as a chronicle of the 1453 siege, an image of Hagia Sophia with minarets, or a historian's passage on Ottoman expansion. The questions ask what the source shows about how rulers legitimized or consolidated power, or how gunpowder weapons helped land-based empires expand.

For the Long essay (Question 2) or the Document-based question (Question 1) on how land-based empires kept control, a strong paragraph names at least two methods and explains how each strengthened the sultan:

  • Hagia Sophia's conversion as religious legitimacy through monumental architecture
  • Devshirme officials replacing noble families at the top of government, giving the sultan an administration trained for his service
  • Cannon-based siege warfare as the military basis for expansion

Comparison raises an answer's level. Mehmed's use of Hagia Sophia lines up with Mughal tombs and mosques or Louis XIV's Versailles as buildings that displayed power. His devshirme officials line up with Akbar's appointed officials or the Qing banner system as ways rulers built loyal service elites. In a Short-answer question 1 (Secondary source) about Ottoman expansion, Mehmed gives you a precise example to cite.

Be careful with one claim. Some textbooks say the fall of Constantinople "caused" European exploration by blocking trade routes. Portuguese voyages along Africa were already underway before 1453, so treat the conquest as one of several factors in shifting trade.

Where this sits in AP® World

Keep studying AP® World Unit 3