Nūr ad-Dīn Abū al-Qāsim Maḥmūd ibn ʿImād ad-Dīn Zengī (February 1118 – 15 May 1174), often shortened to
Nur ad-Din (, "Light of the Faith"), was a member of the
Turkish Zengid dynasty which ruled the
Syrian province of the
Seljuk Empire. He reigned from 1146 to 1174.