This course covers the followings: The rise of the Buwayhid state, the saljukid state and its institutions, The conditions in the Abbassid Caliphate during the fifth and six centuries, its institutions: its reaction to the rise of independent states and the external invasion, the rise of the Atabiq state and its reaction to the crusades, especially Al- Bury and the Zengids . The rise of the ayyubid state : its institutions: and the history of the Muslim East, and its states especially the Ghaznawids, the Ghurids and the khawrismid