This study "The Emirate of Damascus During the Early Crusading Period 488-549/1095-1154 deals with this Emirate which was established in 488/1095, after the defeat and the murder of Taj al-Dawla Tutush near Rayy in 488/1095 by his nephew Sultan Berkiyaruq Ibn Sult-an Malik-Sh5h. The dominions of Ti al-Dawla, mainly in Syria and the Jazira divided between his elder sons King Fakhr al-Mullik Ridwan in Aleppo and King Shams al-Muliik Ducfaq in Damascus. The Kingdom of Damascus comprized south Syria and some parts of the Jazira such as al- Rahba and Mayyafäriqin. Zahir al-Din Tughtekln, who was Atabek of King Duclaq, became the de facto ruler of Damascus during the reign of King Duqaq 488-497/1095-1104. After the death of Duqaq, Tughtekin was to be the real Amir of Damascus, and his dynasty was to gain control of the Emirate until its fall at the hands of Niir al-Din Mahmild of Aleppo in 549/1154. In this thesis, the following matters are discussed: 1. The conditions which led to the foundation of this Emirate. 2. The role of Tughtekin in establishing his authority in the Emirate. 3. The foreign policy of the Emirate, and the factors which shaped this policy. 4. The effects (on the Emirate) of the coming of the Crusaders particularly those of Jerusalem. S. Internal rivalries in the Emirate, and their influence on the stability of the Emirate and its external relations. 6. The policy of alliances adopted by the Emirate and the factors which affected this. 7. The influence of the growing power of Zangi of Aleppo and Mosul (521-541/1127-1146) on Damascus and why he did not succeed in annexing Damascus to his united front in Syria and the Jazira aimed at challenging the power of the Crusaders. 8. The reasons which helped Mir al-Din Mahmüd Ibn Zangi of Aleppo to annex Damascus to his state in 549/1154. 9. The importance of the military power of Damascus and Its role in protecting the Emirate. Finally a concluding section sums up the achievement of the Emirate of Damascus in maintaining its Independence during the period and the role of the Emirate in the Counter-Crusade.