This Day in History: 1258-02-20

(20 February) The last Abbasid Caliph of Baghdad, Al-Musta’sim, was executed after the 10 days of the fall of the Abbasid capital to the Mongols. Along with the caliph, more than 3000 Abbasid officials and notables were also put to death. The majority of Baghdad’s population was erased from existence.