|Siege of Vienna|
|Part of Austrian-Hungarian War (1477-1488)|
Matthias marching into Vienna
|Holy Roman Empire||Kingdom of Hungary|
|Commanders and leaders|
Hanns von Wulfestorff|
Caspar von Lamberg[c]
Bartholomeus von Starhemberg[c]
Tiburtius von Linzendorf[c]
Peter Geréb de Vingard [d]
Stephen V Báthory
Laurence of Ilok[d]
|Imperial Army||Black Army of Hungary|
2,000 foot soldiers|
10,000 foot soldiers|
The Siege of Vienna was a decisive siege in 1485 of the Austrian–Hungarian War. It was a consequence of the ongoing conflict between Frederick III and Matthias Corvinus. The fall of Vienna meant that it merged with Hungary from 1485 to 1490. Matthias Corvinus also moved his royal court to the newly occupied city. Vienna became for more than a decade the capital of Hungary.
In 1483 and 1484, Vienna was already being cut off from the Holy Roman Empire because its concentric defensive strongholds, including Korneuburg, Bruck, Hainburg,and later Kaiserebersdorf, had all fallen. One of the most important engagements was the Battle of Leitzersdorf, which made the following year's siege possible. The city was ravaged by famine, but the emperor, Frederick III, managed to send in some vital supplies with a breakthrough to the city by 16 vessels on the Danube. On 15 January, Matthias called on the city to surrender, but Captain von Wulfestorff refused to do so, in the hope that an imperial relief force would arrive in time. The blockade was fully in place as soon as Matthias attacked Kaiserebersdorf, where he became the target of an assassination attempt, when a cannonball nearly killed him. Matthias suspected treachery, as the accuracy of the shot had been too precise to have come from a long-distance cannon. Only someone who knew the whereabouts of the king would have been able to come so near to killing him. He accused Jaroslav von Boskowitz und Černahora, the brother of his mercenary Captain Tobias von Boskowitz and Černahora, of having been bribed to turn against the king. Jaroslav was summarily beheaded without any chance to clear his name. The events angered his brother Tobias to the point that he ended up returning to the service of Frederick and was placed in charge of his campaigns to try to reconquer his lost lands after the death of Matthias in 1490.
After Kaiserebersdorf was captured in mid-1485, the fate of Vienna was sealed.
Matthias stationed his armies at the Hundsmühle flour mills and in Gumpendorf on the south side of the Vienna River.[b]The King had previously brought in seventeen siege guns to Austria and with it he ordered the constant firing of barrage into the city. At the same time, he also ordered the construction of two siege towers (one of which was later burnt by the resisting Viennese militia). Matthias made his incursion into Leopoldstadt on 15 May, which made the final assault imminent. The Viennese people realized that and negotiated to surrender the inner city to the Hungarian king. They insisted only that their citizens' privileges would be preserved and a guarantee of safe passage.
On 1 June, at the head of a column of his soldiers, Matthias entered the heart of Vienna behind its city walls in triumph.
In the Salzburg Manifesto, Frederick ordered the Austrian states to refuse Matthias's demand for the assembly of a Reichstag. He also put forward that soon-to-be Emperor Maximilian I would come to an aid. According to tradition, that is the origin of A.E.I.O.U., said to be a secret message to all Austrian provinces.
At the end of the campaign, Hungary controlled all of Upper Austria as well, which remained under his control until his death, in 1490.
Matthias deprived Vienna of its staple right, which had so much violated the commercial interests of the nearby countries so much that they formed the Visegrád Group to secure a bypass route away from the city. Vienna enjoyed tax exemption under Matthias' rule. He also delegated a member, Stephen Zápolya, to the Council of Vienna but left the rest of the councillors in their position. He rewarded Zápolya with the city of Ebenfurth and appointed him as the captain of Vienna and governor of the Austrian provinces incorporated into Hungary. The bishop of Pécs, Sigismund Ernuszt, was promoted to vice-governor, and Nikolaus Kropatsch took care of the military affairs. The prominent captains received houses in Vienna.
- a Geissau pp. 35
- b Geissau pp. 36–37 (Hundsmühle and Heumühle were Middle age flour mills in Vienna next to the "Am Gries" marshes on the right bank of the Wien river)
- c Geissau pp. 41–42
- d Geissau pp. 52
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