Muhyi al-Din (or Mujir al-Din) Abu Ali Abd al-Rahim ibn Ali ibn Muhammad ibn al-Hasan al-Lakhmi al-Baysani al-Asqalani, better known by the honorific name al-Qadi al-Fadil (Arabic: القاضي الفاضل, romanized: al-Ḳāḍī al-Fāḍil, lit. 'the Excellent Judge'; 3 April 1135 – 26 January 1200) was an official who served the last Fatimid caliphs, and became the secretary and chief counsellor of the first Ayyubid sultan, Saladin.