ʿIṣmat ad-Dīn Khātūn (Arabic: عصمت الدين خاتون; died 1186), also known as Asimat, was the daughter of Mu'in ad-Din Unur, regent of Damascus.
[1] Her father became regent of Damascus in 1138, and ruled the city on behalf of a series of young emirs of the Burid dynasty.
During this time, Damascus' chief rivals to the north, Aleppo and Mosul, were united under the rule of the Zengid dynasty.
When Nur ad-Din died in 1174, King Amalric I of Jerusalem took advantage of the situation and besieged the city of Banias.
[3] Nur ad-Din's former general Saladin had meanwhile gained control over Egypt, and claimed Damascus as his successor.