Hassan al-Mustadi Ibn Yusuf al-Mustanjid (1142 – 30 March 1180) (المستضيء بأمر الله) was the Abbasid Caliph in Baghdad from 1170 to 1180. Like his predecessor, he continued to occupy a more or less independent position, with a vizier and courtly surroundings, and supported by only a small force sufficient for an occasional local ...