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Siege of Buda (1529)
	Part of the Little War in Hungary; Habsburg–Ottoman war of 1529–1533
	; Suleiman after the capture of Buda in 1529
Date	August 26 - September 8, 1529
Location	Buda, Hungary
Result	Ottoman victory Ottomans capture Buda; John Sigismund Zápolya installed as vassal of Suleiman;
Belligerents
Holy Roman Empire Habsburg-held Hungary;	Ottoman Empire John Szapolyai's Hungarian Kingdom;
Commanders and leaders
Ferdinand I	Suleiman the Magnificent
Strength
Unknown	Unknown
Casualties and losses
Unknown	Unknown

The siege of Buda was a military operation led by the Ottoman Empire with the aim of capturing Buda and installing John Zápolya as its ruler.^[1]^[2]

Ferdinand I was able to defeat John Zápolya in September 1527 and have himself crowned in November.^[2] Zápolya refused to give up his claims to the Hungarian throne and therefore appealed to Suleiman for recognition in return for tribute.^[2] Suleiman accepted Zápolya as his vassal in February and in May 1529 Suleiman personally embarked on his campaign.^[1]

On 26–27 August Suleiman had Buda encircled and the siege began.^[1] The walls were destroyed by intensive cannon and gun fire of the Ottoman artillery between 5 and 7 September.^[1] The military preparedness, uninterrupted attacks and physical and psychological destruction that was caused by the Ottoman artillery had the desired effect.^[1] The German mercenaries surrendered and ceded the castle to the Ottomans on 8 September.^[1] John Zápolya was installed in Buda as a vassal of Suleiman.^[3]

After the defeat of Ferdinand his supporters were promised safe passage from the town, however the Ottoman troops slaughtered them outside of the city walls.^[4]