Treaty of Constantinople between Ottoman Empire and Austria
- When
- 1533
- Where
- Constantinople
- Episodes
- 1
The Treaty of Constantinople, signed on 22 July 1533, ended the Habsburg-Ottoman war of 1529-1533. Ferdinand I of Austria acknowledged Ottoman suzerainty, recognized Suleiman the Magnificent as his suzerain, and agreed to pay annual tribute. John Zápolya was recognized as King of Hungary under Ottoman protection.
Episodes
Background and detail
Background. Following the death of Louis II at Mohács in 1526, the Hungarian throne became disputed. John Zápolya, backed by the Hungarian elite and the Ottomans, claimed the title, while Archduke Ferdinand I asserted Habsburg rights. Suleiman the Magnificent supported Zápolya and launched military campaigns against Austria in 1529 and 1532 to pressure the Habsburgs.
Aftermath. The truce was short-lived. From 1536, after successfully completing his campaign of the two Iraqs (1534 to 1535), Suleiman considered the truce invalid. The agreement remained a point of contention, with some historians describing it as a mere verbal promise rather than a formal treaty, reflecting the complex diplomatic status of the Habsburg-Ottoman relationship.
People involved
- Ferdinand I · Archduke of Austria and claimant to the Hungarian throne
- John Zápolya · King of Hungary and Voivode of Transylvania
- Suleiman the Magnificent · Sultan of the Ottoman Empire
Sources
- Truce of Constantinople (1533) Wikipedia, revision of 2026-09-11
- John Zápolya Wikipedia, revision of 2026-07-18
- Suleiman the Magnificent Wikipedia
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.