second Moroccan caliph of the Almohad (Muʾminid) dynasty (r. 1163–1184), was a great patron of philosophy and architecture, a defensive leader, and statesman. The beginning of his reign was rocked by conflict over succession. His father, ʿAbd al-Muʾmin, had designated Muhammad, the older brother of a different mother as his successor. Muhammad was in power from a few weeks to a few months. The sources differ on the exact length of his reign.
However it was clear from the beginning that Muhmmad did not have the ambition or the ability to lead the vast administrative and military apparatus his father had created ʿAbu Yaʿqub Yusuf had the support of a powerful woman his mother It seems this formidable woman and her other son the powerful vizier Abu Hafs ʿUmar conspired to elevate ʿAbu Yaʿqub Yusuf as caliph ʿUmar claimed that the caliph ʿAbd al Muʾmin had declared to him ...