The longest-reigning Ottoman sultan: conqueror, law-giver and patron of Sinan, whose 46 years on the throne shaped how both Turks and Europeans remember the empire.
Last reviewed on 27 September 2026.
Süleyman I ruled the Ottoman Empire from 1520 to 1566, longer than any other sultan. Europeans called him "the Magnificent"; in Turkish he is Kanuni, "the Law-Giver". His reign saw the conquest of Belgrade, Rhodes, most of Hungary and Iraq, Ottoman naval dominance in the Mediterranean, the architecture of Sinan and a court culture that later generations looked back on as a golden age. It also saw the execution of his closest friend and of two of his sons. This page covers the campaigns, the government, the family politics and the buildings, and ends with how historians assess him now.
Süleyman was born in Trabzon, where his father Selim was provincial governor, in 1494 or 1495 (sources differ). He served as governor of Manisa, the traditional training post for Ottoman princes, and when Selim I died in September 1520 he succeeded without a fight — unusually, he was Selim's only surviving son. Selim had just doubled the empire by conquering Syria, Egypt and the Hejaz (1516–17), so Süleyman inherited a treasury, an army and the prestige of guardian of Mecca and Medina. His mother, Hafsa Sultan, was an influential figure at court until her death in 1534; her mosque complex stands in Manisa.
Süleyman moved quickly against two fortresses that had defeated his great-grandfather Mehmed II. Belgrade, the Hungarian key to the Danube, fell on 29 August 1521 and opened the road into central Europe. Rhodes, held by the Knights Hospitaller of St John, whose ships preyed on Ottoman shipping between Istanbul and Egypt, was besieged from the summer of 1522. After some five months of mining and assaults the Knights accepted terms and left the island at the start of January 1523, with their arms and any inhabitants who wished to go. They moved eventually to Malta, where they would face the Ottomans again.
On 29 August 1526 Süleyman's army destroyed the Hungarian army at Mohács, on the Danube in southern Hungary, in a battle lasting a couple of hours. King Louis II of Hungary and Bohemia drowned while fleeing, and the Hungarian kingdom split between two claimants: John Zápolya, a Hungarian magnate whom Süleyman backed, and Ferdinand of Habsburg, brother of the emperor Charles V. The contest between Ottomans and Habsburgs over Hungary would last for nearly two centuries.
In 1529 Süleyman marched on Vienna itself. The army arrived late in September after a very wet summer that had forced it to leave much of the heavy artillery behind; the defenders held, and with winter approaching and supplies short, the Ottomans withdrew in mid-October after about three weeks. A second march on Austria in 1532 stalled at the small fortress of Kőszeg (Güns). In 1541 Süleyman annexed central Hungary, including Buda, as a directly ruled Ottoman province, leaving Transylvania as a vassal principality and a strip of the west and north to the Habsburgs.
In the east the rival was Safavid Iran, whose Shi'i shahs competed with the Sunni Ottomans for the loyalty of Anatolian Turkmen and for control of eastern Anatolia and Iraq. In the campaign of 1533–36, led first by the grand vizier Ibrahim Pasha and then by Süleyman himself, the Ottomans took Tabriz and, in late 1534, Baghdad, the old Abbasid capital, without a fight. Iraq, with access to the Persian Gulf through Basra (taken in the 1540s), became Ottoman for most of the next four centuries. Further campaigns in 1548–49 and 1553–55 ended in the Peace of Amasya (1555), the first formal peace between the two empires, which left Iraq and most of eastern Anatolia to the Ottomans.
Süleyman's reign made the Ottomans the leading naval power in the Mediterranean. The key figure was Hayreddin Barbarossa, a corsair from Lesbos who, with his brother Oruç, had built a power base in Algiers and placed it under Ottoman suzerainty. In 1533 Süleyman summoned him to Istanbul and made him admiral of the fleet (kapudan paşa). In 1538, off Preveza on the western coast of Greece, Barbarossa outmanoeuvred a larger Holy League fleet under the Genoese admiral Andrea Doria, securing Ottoman control of the eastern Mediterranean for a generation.
The navy also served diplomacy. France, encircled by Habsburg lands, became an Ottoman partner, and in 1543–44 Barbarossa's fleet wintered at Toulon, which was temporarily cleared of many of its inhabitants for the purpose — a scandal in Christian Europe. Barbarossa died in 1546 and is buried in Beşiktaş, Istanbul, beside the ferry pier. After him the Ottomans won at Djerba (1560) but failed to take Malta from the Knights in 1565. In the Indian Ocean, Ottoman fleets from Suez and Basra challenged the Portuguese with mixed results, including a failed siege of Diu in 1538.
The Turkish epithet refers to kanun, the sultan's administrative law, which existed alongside the şeriat (Islamic law) and covered matters such as land tenure, taxation, criminal penalties and the organisation of the provinces. Süleyman did not invent Ottoman law; his reign saw a large body of existing regulations collected, revised and applied more consistently, in general law codes and in provincial codes (kanunname) for each region. Much of the intellectual work was done by the chief jurist Ebussuud Efendi, Şeyhülislam from 1545 to 1574, whose legal opinions (fetva) worked to reconcile the sultan's law with Islamic jurisprudence, notably on land and taxation. The reign also consolidated a professional, largely devşirme-recruited ruling class and a bureaucracy that kept systematic records, such as the mühimme registers of imperial orders.
Süleyman was also a poet, writing under the pen name Muhibbi ("the loving one"), and the empire's leading poet of the age, Baki, enjoyed his patronage.
Ibrahim, a Greek-born slave from Parga who had been Süleyman's companion since his time as a prince, was appointed grand vizier in 1523 and given unprecedented power and wealth. His palace on the Hippodrome in Istanbul now houses the Museum of Turkish and Islamic Arts. He led campaigns, conducted diplomacy with the Habsburgs and the French, and is reported to have styled himself in ways that seemed to put him close to the sultan's rank. In March 1536, after returning from the eastern campaign, he was executed in the palace on the sultan's order. The exact reasons are not documented; contemporaries and later writers point to his arrogance, rivalries with other officials, and the influence of Hürrem.
Hürrem, known in Europe as Roxelana, came from Ruthenia (in present-day Ukraine) and entered the imperial harem as an enslaved captive. She became Süleyman's favourite and broke Ottoman dynastic convention twice: she bore the sultan several sons instead of the customary one per concubine, and at some point around the mid-1530s Süleyman freed and formally married her. She stayed in Istanbul rather than accompanying a son to his provincial post, and her letters to the sultan survive. Her charitable foundations include the Haseki Sultan complex in Istanbul, designed by Sinan, and the double bath near Hagia Sophia that bears her name. She died in 1558 and is buried at the Süleymaniye. Venetian ambassadors' reports cast her as a scheming manipulator, and later historians often followed them; recent scholarship treats those reports with more caution and emphasises her political role. Her prominence is often taken as the start of the so-called "Sultanate of Women", a period of influential royal women in the following century.
Süleyman's eldest surviving son, Mustafa, born to Mahidevran, was popular with the army and widely expected to succeed. In October 1553, during a campaign against Iran, Süleyman summoned him to the army camp at Ereğli, near Konya, and had him strangled in the imperial tent. The sultan appears to have believed that Mustafa was plotting to seize the throne, as Selim I had done against his own father. Many at the time blamed Hürrem and her son-in-law, the grand vizier Rüstem Pasha, for turning the sultan against him; the evidence is circumstantial. The death caused open grief in the army and inspired a famous elegy by the poet Taşlıcalı Yahya.
Hürrem's son Cihangir died soon afterwards. Her two surviving sons, Selim and Bayezid, then fought for the succession; Bayezid was defeated near Konya in 1559, fled to Iran, and was handed over and executed with his sons in 1561. Selim II succeeded his father.
The reign's most visible legacy is architecture. Mimar Sinan, a devşirme recruit who served as a Janissary military engineer, became chief imperial architect around 1538 and held the post for about fifty years, with hundreds of buildings attributed to his office. For Süleyman he built the Şehzade Mosque (1543–48) in memory of Prince Mehmed, who died young in 1543, and then the Süleymaniye (1550–57) on Istanbul's Third Hill. The mosque is surrounded by a complex of colleges, a medical school, hospital, soup kitchen, bath, caravanserai and shops, and in its garden stand the tombs of Süleyman and Hürrem; Sinan's own modest tomb is just outside the corner of the precinct. Sinan considered the later Selimiye in Edirne, built for Selim II, his masterpiece. The Süleymaniye is part of the "Historic Areas of Istanbul" UNESCO World Heritage Site.
In 1566, in his seventies and in poor health, Süleyman led one more campaign into Hungary. The army besieged the fortress of Szigetvár, defended by the Croatian-Hungarian nobleman Nikola Zrinski (Zrínyi Miklós). Süleyman died in his tent on the night of 6–7 September, days before the fortress fell; Zrinski died leading a final sortie. The grand vizier Sokollu Mehmed Pasha kept the death secret for weeks so that the army would not mutiny and Selim could reach the capital. The sultan's body was returned to Istanbul and buried at the Süleymaniye. His internal organs are said to have been buried near Szigetvár, where a tomb was built; archaeologists identified its likely site in 2015–16 at Turbék, near the town. A Turkish–Hungarian friendship park stands nearby.
Süleyman's reign has long been presented as the Ottoman zenith, after which the empire "declined". Historians now largely reject that framework. The empire continued to expand after 1566, reaching its greatest extent in Europe in the later 17th century, and what followed Süleyman is better described as a transformation of its institutions than a steady fall. Even at the time, the reign's costs were visible: repeated campaigns strained the treasury, the violent succession struggles disturbed contemporaries, and the Vienna, Malta and Indian Ocean failures showed the limits of Ottoman reach. On any measure, though, the reign consolidated a huge and diverse empire, gave it a codified legal and administrative framework, and left monuments that still define the Istanbul skyline. In Turkey today his reign has reached a wide audience through the television series Muhteşem Yüzyıl (2011–14), which was hugely popular at home and abroad and criticised by some for its portrayal of the sultan.
Magnificent is a European epithet reflecting the splendour of his court, army and building projects as seen from the West. In Turkish he is called Kanuni, the Law-Giver, because his reign codified and systematised Ottoman administrative law.
Süleyman ruled from September 1520 until his death in September 1566, about 46 years. It was the longest reign of any Ottoman sultan.
Yes. He besieged Vienna in the autumn of 1529, but the army arrived late after a wet summer, without much of its heavy artillery, and withdrew after about three weeks. A later march on Austria in 1532 stalled at the fortress of Kőszeg, and Vienna was not seriously threatened again until 1683.
Hürrem, known in Europe as Roxelana, was an enslaved woman from Ruthenia who became Süleyman's favourite and then his legal wife, an unprecedented step. She was politically influential, founded major charitable complexes in Istanbul, and died in 1558. She is buried beside him at the Süleymaniye Mosque.
In 1553 Süleyman had Prince Mustafa strangled in the army camp at Ereğli, apparently believing he was plotting to seize the throne. Many at the time blamed Hürrem and the grand vizier Rüstem Pasha for turning the sultan against him, but the evidence for that is circumstantial.
Süleyman is buried in his tomb in the garden of the Süleymaniye Mosque in Istanbul, near the tomb of Hürrem. He died during the siege of Szigetvár in Hungary in 1566, and his internal organs are said to have been buried there, at a site archaeologists identified in 2015 and 2016.