Sifen Vienna, a shekara ta 1529, shine yunkurin farko da daular Usmaniyya ta yi na kwace birnin Vienna na kasar Ostiriya.Suleiman mai girma Sarkin Daular Usmaniyya ya kai hari a birnin da sama da mutane 100,000, yayin da masu tsaron baya karkashin jagorancin Niklas Graf Salm ba su wuce 21,000 ba.Duk da haka, Vienna ta sami damar tsira daga kewayen, wanda a ƙarshe ya wuce sama da makonni biyu, daga 27 ga Satumba zuwa 15 ga Oktoba 1529.Sifen ya zo ne bayan yakin Mohács na 1526, wanda ya yi sanadin mutuwar Louis II, Sarkin Hungary , da saukowar masarautar cikin yakin basasa.Bayan mutuwar Louis, ƙungiyoyin hamayya a Hungary sun zaɓi magaji biyu: Archduke Ferdinand I na Austria, wanda House of Habsburg ke goyan bayan, da John Zápolya.A ƙarshe Zápolya zai nemi taimako daga, kuma ya zama ƙwararrun Daular Ottoman, bayan Ferdinand ya fara iko da yammacin Hungary, ciki har da birnin Buda.Harin da Ottoman ya kai a Vienna wani bangare ne na tsoma bakin daular cikin rikicin kasar Hungary, kuma cikin kankanin lokaci ya nemi tabbatar da matsayin Zápolya.Masana tarihi suna ba da fassarori masu cin karo da juna na dogon lokaci na manufofin Ottoman, ciki har da abubuwan da suka sa aka zabi Vienna a matsayin manufar yakin neman zabe.Wasu masana tarihi na zamani sun nuna cewa babban burin Suleiman shine tabbatar da ikon Ottoman a kan dukkan kasar Hungary, ciki har da yammacin (wanda aka sani da Royal Hungary) wanda a lokacin yana karkashin ikon Habsburg.Wasu malaman sun ba da shawarar Suleiman ya yi niyyar amfani da Hungary a matsayin wurin da za a ci gaba da mamaye Turai.Gazawar da aka yi wa kewayen Vienna ya zama farkon shekaru 150 na tashin hankali na soji tsakanin Habsburgs da Ottoman, wanda ya haifar da hare-hare na juna, kuma ya kai ga hari na biyu na Vienna a shekara ta 1683.