أبو يعقوب يوسف بن عبد المؤمن

Abu Ya'qub Yusuf ibn Abd al-Mu'min, second Almohad caliph — deposed the designated heir, his brother Muhammad, in Sha'ban 558, posted his brother Abu Hafs 'Umar over al-Andalus, and grew up between the cavalry and the scholars: a firm jurist whose bent ran to wisdom and philosophy, his dinars the 'Yusufis' of the Maghreb. He crossed in 566 with a hundred thousand horse, and at Seville the death of Ibn Mardanish (Rajab 567 — his mother was said to have poisoned him) brought the sons to surrender all the east of al-Andalus; Yusuf raided to the gates of Toledo, took Gafsa in 575, and died of illness (some said a Frankish arrow) at the month-long siege of Santarém in Rabi' I 580, carried home in a coffin while the Almohad commanders settled the succession on his son Ya'qub without a written will.