Some historians speculate that Suleiman's final assault was not necessarily intended to take the city but to cause as much damage as possible and weaken it for a later attack, a tactic he had employed at Buda in 1526.
Suleiman would lead another campaign against Vienna in 1532, but it never truly materialised as his force was stalled by the Croatian Captain Nikola Jurišić during the Siege of Güns (Kőszeg).
Nikola Jurišić with only 700–800 Croatian soldiers managed to delay his force until winter closed in.
Charles V, now largely aware of Vienna's vulnerability and weakened state, assembled 80,000 troops to confront the Ottoman force.
Instead of going ahead with a second siege attempt, the Ottoman force turned back, laying waste the south-eastern Austrian state of Styria in their retreat.
The two Viennese campaigns in essence marked the extreme limit of Ottoman logistical capability to field large armies deep in central Europe at the time.

The 1529 campaign produced mixed results.
Buda was brought back under the control of the Ottoman vassal John Zápolya, strengthening the Ottoman position in Hungary.
The campaign left behind a trail of collateral damage in neighbouring Habsburg Hungary and Austria that impaired Ferdinand's capacity to mount a sustained counter-attack.
However, Suleiman failed to force Ferdinand to engage him in open battle, and was thus unable to enforce his ideological claim to superiority over the Habsburgs.
The attack on Vienna led to a rapprochement between Charles V and Pope Clement VII, and contributed to the Pope's coronation of Charles V as Holy Roman Emperor on February 24, 1530.
The outcome of the campaign was presented as a success by the Ottomans, who used the opportunity to show off their imperial grandeur by staging elaborate ceremonies for the circumcision of princes Mustafa, Mehmed, and Selim.

Ferdinand I erected a funeral monument for the German mercenary Nicholas, Count of Salm, head of the mercenary relief force dispatched to Vienna, as a token of appreciation of his efforts.
Nicholas survived the initial siege attempt, but had been injured during the last Ottoman assault and died on 4 May 1530.
The Renaissance sarcophagus is now on display in the baptistery of the Votivkirche cathedral in Vienna.
Ferdinand's son, Maximilian II, later built the Castle of Neugebaeude on the spot where Suleiman is said to have pitched his tent during the siege.
Some historians speculate that Suleiman's final assault was not necessarily intended to take the city but to cause as much damage as possible and weaken it for a later attack, a tactic he had employed at Buda in 1526. Suleiman would lead another campaign against Vienna in 1532, but it never truly materialised as his force was stalled by the Croatian Captain Nikola Jurišić during the Siege of Güns (Kőszeg). Nikola Jurišić with only 700–800 Croatian soldiers managed to delay his force until winter closed in. Charles V, now largely aware of Vienna's vulnerability and weakened state, assembled 80,000 troops to confront the Ottoman force. Instead of going ahead with a second siege attempt, the Ottoman force turned back, laying waste the south-eastern Austrian state of Styria in their retreat. The two Viennese campaigns in essence marked the extreme limit of Ottoman logistical capability to field large armies deep in central Europe at the time.
The 1529 campaign produced mixed results. Buda was brought back under the control of the Ottoman vassal John Zápolya, strengthening the Ottoman position in Hungary. The campaign left behind a trail of collateral damage in neighbouring Habsburg Hungary and Austria that impaired Ferdinand's capacity to mount a sustained counter-attack. However, Suleiman failed to force Ferdinand to engage him in open battle, and was thus unable to enforce his ideological claim to superiority over the Habsburgs. The attack on Vienna led to a rapprochement between Charles V and Pope Clement VII, and contributed to the Pope's coronation of Charles V as Holy Roman Emperor on February 24, 1530. The outcome of the campaign was presented as a success by the Ottomans, who used the opportunity to show off their imperial grandeur by staging elaborate ceremonies for the circumcision of princes Mustafa, Mehmed, and Selim.
Ferdinand I erected a funeral monument for the German mercenary Nicholas, Count of Salm, head of the mercenary relief force dispatched to Vienna, as a token of appreciation of his efforts. Nicholas survived the initial siege attempt, but had been injured during the last Ottoman assault and died on 4 May 1530. The Renaissance sarcophagus is now on display in the baptistery of the Votivkirche cathedral in Vienna. Ferdinand's son, Maximilian II, later built the Castle of Neugebaeude on the spot where Suleiman is said to have pitched his tent during the siege.
Siege of Vienna