A History of the countries of the Maghreb and Andalusia in the Era of the Almohads. Covering the Almohad Caliphate (12th Century CE. the Banu Abd al-Mumin), the empire founded in the Maghreb, where they first established the Berber state, They extended their rule into other parts of North Africa and into Al-Andalus. An early work by Abd al-Malik ibn Sahib al-Salah (active 12th Century CE), with editing of Abd al-Hadi al-Tazi.