Multiple choice Who was the abbassid Caliph murdered by Halaku? Caliph Al Mustarim Caliph Umar Caliph Abu-i-Nazar Caliph Abu Umar Gul Reveal answer Fill a bubble to check yourself A Correct answer Explanation Halaku Khan (Hulagu Khan), grandson of Genghis Khan and founder of the Ilkhanate, sacked Baghdad in 1258 and executed Caliph Al-Musta'sim. This marked the end of the Abbasid Caliphate in Baghdad and was a major turning point in Islamic history.