The vizier Shihab al-Din ibn al-'Ajami was assassinated near the great mosque of Aleppo

Summary:
Sinan, leader of the Isma'iliyya (Assassins) sect, murdered 'Abd al-Rahim, the vizier of Nur al-Din's son al-Malik al-Salih Isma'il, believing that he was complying with an order coming from Isma'il himself. But it was Sa'd al-Din Kumushtukin who had sent the letter to Sinan, using a blank sealed paper he had obtained from Isma'il, so as to pretend that the order came from the latter. 'Abd al-Rahim was assassinated as he left the Great Mosque of Aleppo on a Friday. Isma'il later wrote to Sinan reproaching him for the murder 
Dates:
1177 
Shihab al-Din 'Abd al-Rahim al-'Ajami (Abdarrahim 101)
  • While coming out of the Great Mosque of Aleppo on Friday, he was murdered by the Assassins (al-Isma'iliyya) (August 31, 1177:سنة ثلاث وسبعين وخمسمائة ... رابع شهر ربيع الأول) قفزوا الاسماعيلية على الوزير ... وهو خارج من الجامع يوم الجمعة فقتلوه Ibn Shaddad 388-389
al-Malik al-Salih Isma'il b. Nur al-Din (Ismail 102)
  • Wrote to Sinan 101, chief of the Ismailiyya, reproaching him for the murder of his vizier Abdarrahim 101 (:) كتب الملك الصالح ... كتاباً الى سنان مقدم الإسماعيلية يعاتبه على ذلك Ibn Shaddad 388-389
Sa'd al-Din Kumushtukin (Kumushtukin 101)
  • Sent a letter to Sinan 102 with the order to kill Abdarrahim 101, using a blank sealed paper he had obtained from Ismail 102 so as to pretend that the order came from the latter (:) فسير [سنان] اليه يعلمه أنه ما قتله الا بأمره ومع الرسول كتاب بذلك فيه علامة الملك الصالح فلما وقف عليه الملك الصالح فحص عنه فإذا سعد الدين كمشتكين كان قد قدم اوراقاً بيضاً وسأله أن يعلم عليها ليصرف في مهمات الدولة Ibn Shaddad 388
Sinan, leader of the Isma'iliyya (Assassins) sect (Sinan 102)
  • He had the vizier Abdarrahim 101 murdered, believing that he was complying with an order coming from Ismail 102 (:) قفزوا الأسماعيلية على ... عبد الرحيم ... فكتب الملك الصالح ... إلى سنان مقدم الأسماعيلية يعاتبه على ذلك فسير اليه يعلمه انه ما قتله إلا بأمره Ibn Shaddad 388