The Ottoman Sieges of Vienna: The History of the Ottoman Empire’s Unsuccessful Attempts to Conquer the Habsburg Capital

In terms of geopolitics, perhaps the most seminal event of the Middle Ages was the successful Ottoman siege of Constantinople in 1453. The city had been an imperial capital as far back as the 4th century, when Constantine the Great shifted the power center of the Roman Empire there, effectively establishing two almost equally powerful halves of antiquity’s greatest empire. Constantinople would continue to serve as the capital of the Byzantine Empire even after the Western half of the Roman Empire collapsed in the late 5th century. Naturally, the Ottoman Empire would also use Constantinople as the capital of its empire after their conquest effectively ended the Byzantine Empire, and thanks to its strategic location, it has been a trading center for years and remains one today under the Turkish name of Istanbul.

In the wake of taking Constantinople, the Ottoman Empire would spend the next few centuries expanding its size, power, and influence, bumping up against Eastern Europe and becoming one of the world’s most important geopolitical players. It would take repeated efforts by various European coalitions to prevent a complete Ottoman takeover of the continent, and one of the most important battles among those efforts took place at Vienna in 1529.

At the time, the Ottomans were led by one of their most famous sultans, Suleiman the Magnificent, and different chroniclers have analyzed Suleiman's behavior in different ways. There is a plethora of opinions as to his motives for attempting the takeover of Vienna, a well-guarded city far away from his empire's center. Had he intended to conquer the whole of the Holy Roman Empire? Had he intended to strengthen his borders? Had he acted in accordance with King Francis I’s needs in the West? No matter the reason, Suleiman did not halt in his advances, despite the fact circumstances were not favorable for the Ottomans. The summer rains had already begun when he set out for Vienna, making most of the roads inaccessible both for cavalry and moving the heavy pieces of artillery needed for a successful siege. The camels brought from Anatolia proved too sensitive for the cold, constant rain and died in large numbers, and many of the soldiers shared the same fate.

The conflict between Christianity and Islam has been one of the defining factors in Europe and the Middle East, and while this dichotomy might be an excessively simple and incomplete explanation, there is no doubt that it has generated the world today and arguably reached its peak with the Ottoman attack in 1683. At the time, the Ottomans ruled Asia Minor, the Middle East (with the exception of Iran), northern Africa to the borders of Morocco, the Balkan Peninsula up to the lands of modern Poland, as well as portions of Poland, Ukraine, Crimea, and Georgia. The sultan was styled “His Imperial Majesty the Padishah (Emperor), Commander of the Faithful and Successor to the Prophet of the Lord of the Universe.” He was considered by his subjects to be the Caliph, the supreme leader of the faithful throughout the world. The duty of holy jihad was vested by the umma in his hands, and the sultans had successfully overpowered the forces of the Christian princes time and time again.

The long conflict between the Habsburgs and the Ottomans would finally come to a head in 1683 outside the city of Vienna, the center of Habsburg power in central Europe. It would be no exaggeration to say that the fighting around Vienna represented one of the most important battles not only in the conflict between Islam and Christendom, but in the entire history of the world. If the Habsburgs had lost that battle, it is highly likely that Islamic civilization rather than Christian would dominate much of Europe.