Osmanlı İmparatorluğu (The Ottoman Empire): A Quick History
The Ottoman Empire was founded around 1299 by Osman I in northwestern Anatolia and grew over six centuries into one of the largest and longest-lasting empires in history, at its peak stretching across Southeast Europe, the Middle East, and North Africa. Istanbul — then Constantinople — became its capital after Sultan Mehmed II conquered the city in 1453, ending the Byzantine Empire.
The empire reached its territorial and cultural height in the 16th and 17th centuries under sultans like Süleyman the Magnificent, whose imperial architecture — including Süleymaniye Mosque, built by the architect Mimar Sinan — still defines much of Istanbul's skyline today.
From the 18th century onward, the empire entered a long period of relative decline against rising European powers, a process historians debate the exact causes and pace of, but which ultimately ended with the empire's dissolution after the First World War.
Founded
c. 1299
Capital from 1453
Istanbul (Constantinople)
Ended
1922 (abolished), 1923 (republic declared)
Why Did the Ottoman Empire Collapse? (Osmanlı Neden Çöktü?)
Falling Behind Militarily and Economically
From the 18th century, European rivals industrialized faster and modernized their militaries, while the Ottoman economy struggled to keep pace — a gap that widened over the following century.
Rising Nationalism
Nationalist movements among the empire's many ethnic and religious groups in the Balkans and elsewhere led to a series of independence movements and territorial losses throughout the 19th and early 20th centuries.
Debt and Foreign Financial Control
Heavy borrowing from European powers left the empire deeply in debt by the late 1800s, leading to foreign oversight of Ottoman finances through the Ottoman Public Debt Administration.
Defeat in World War I
The Ottoman Empire entered World War I allied with Germany and Austria-Hungary, and its defeat in 1918 led directly to the occupation and partition of its remaining territory under the Treaty of Sèvres.
The War of Independence and Abolition
A Turkish nationalist movement led by Mustafa Kemal Atatürk fought off the partition plan in the Turkish War of Independence. The sultanate was formally abolished in 1922, and the Republic of Turkey was declared in 1923.
The Ottoman Legacy in Istanbul Today
Imperial mosques by Mimar Sinan
- Where
- Süleymaniye Camii, and others across the historic peninsula
The sultans' residences
- Where
- Topkapı Sarayı, Dolmabahçe Palace, Yıldız Sarayı
The Topkapı Hançeri and imperial treasures
- Where
- Topkapı Sarayı's Treasury
Ottoman-era infrastructure
- Where
- Water reservoirs and aqueducts in Belgrad Ormanı, among other sites
| What You Can Still See | Where |
|---|---|
| Imperial mosques by Mimar Sinan | Süleymaniye Camii, and others across the historic peninsula |
| The sultans' residences | Topkapı Sarayı, Dolmabahçe Palace, Yıldız Sarayı |
| The Topkapı Hançeri and imperial treasures | Topkapı Sarayı's Treasury |
| Ottoman-era infrastructure | Water reservoirs and aqueducts in Belgrad Ormanı, among other sites |
Frequently Asked Questions
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