The Siege of Baghdad in 1258 was led by Hulagu Khan, grandson of Genghis Khan, who commanded the Mongol forces against the Abbasid Caliphate. After a brief siege, the city fell on February 10, 1258, resulting in the destruction of the House of Wisdom, the execution of Caliph Al-Musta'sim, and the end of the Abbasid Caliphate. This event is often considered to mark the end of the Islamic Golden Age.