Siege na Bagadaza wani hari ne da ya faru a Bagadaza a shekara ta 1258, wanda ya dauki tsawon kwanaki 13 daga ranar 29 ga Janairu, 1258 har zuwa ranar 10 ga Fabrairu, 1258. Siege, da sojojin Ilkhanate Mongol da dakarun kawance suka kafa, ya hada da zuba jari, kamawa, da kuma kora. na Bagadaza, wadda ita ce helkwatar Khalifancin Abbasiyawa a lokacin.Mongols sun kasance karkashin jagorancin Hulagu Khan, ɗan'uwan khagan Möngke Khan, wanda ya yi niyyar kara wa'adin mulkinsa zuwa Mesopotamiya amma ba kai tsaye ya kifar da Halifanci ba.Möngke, duk da haka, ya umurci Hulagu da ya kai hari Baghdad idan halifa Al-Musta'sim ya ki amincewa da bukatun Mongol na ci gaba da mika wuya ga khagan da kuma biyan haraji a cikin nau'i na tallafin soja ga sojojin Mongol a Farisa .Hulagu ya fara yakinsa a Farisa a kan tungar Nizari Ismailis, wadanda suka rasa matsuguninsu na Alamut.Daga nan sai ya zarce zuwa Bagadaza, yana mai neman Al-Musta'sim ya amince da sharuddan da Möngke ya gindaya wa Abbasiyawa.Duk da cewa Abbasiyawa sun kasa shiryawa mamaya, amma Halifa ya yi imanin cewa Bagadaza ba za ta iya fadawa hannun dakarun mamaya ba, ya ki mika wuya.Daga bisani Hulagu ya kewaye birnin, wanda ya mika wuya bayan kwanaki 12.A cikin mako mai zuwa, Mongols sun kori Bagadaza, inda suka aikata ta'asa da dama akwai muhawara a tsakanin masana tarihi game da matakin lalata littattafan laburare da kuma manyan dakunan karatu na Abbasiyawa.Mongoliya sun kashe Al-Musta'sim tare da kashe jama'a da dama a cikin birnin, wanda ya yi barna matuka.An yi la'akari da wannan kawanya a matsayin karshen zamanin zinare na Musulunci, wanda a lokacin halifofi suka tsawaita mulkinsu tun dagatsibirin Iberian zuwa Sindh, wanda kuma ya sami nasarori da dama na al'adu a fagage daban-daban.