Abū Naṣr al-Kāshī, Aḥmad b. al-Faḍl b. Maḥmūd al-Kāshānī (d. Rabīʿ II 521/April 1127), known as Muʿīn al-Dīn (or Muʿīn al-Mulk: Ibn al-Athīr, 10/647) Mukhtaṣṣ al-Mulk (or Mukhtaṣṣ Mulūk: al-Bundārī et passim; Munshī Kirmānī, 64), was head of the chancery office (dīwān-sālār) and vizier to the Saljūq sultan Sanjar. Most of what is known about him is taken from the reports of Anūshīrwān b. Khālid (d. 532/1138) who was an administrator, historian and Abū Naṣr's contemporary. The reports of Anūshīrwān, transmitted by al-Bundārī al-Iṣfahānī…