Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. al-Malik al-Adil Nur ad-Din Abu al-Qasim Mahmud Ibn ''Imad ad-Din Zangi (February 1118 May 15, 1174), also known as Nur ed-Din, Nur al-Din, etc. was a member of the Turkish Zengid dynasty which ruled the Syrian province of the Seljuk Empire. He reigned from 1146 to 1174. Nur ad-Din was the second son of Imad ad-Din Zengi, the Turkish atabeg of Aleppo and Mosul, who was a devoted enemy of the crusader presence in Syria. After the assassination of his father, Nur ad-Din and his older brother Saif ad-Din Ghazi I divided the kingdom amongst themselves, with Nur ad-Din governing Aleppo and Saif ad-Din Ghazi establishing himself in Mosul. The border between the two new kingdoms was formed by the Nahr al-Khabur.