Ibn Ḥajar al-ʿAsqalānī or Imam Ibn Ḥajar (18 February 1372 – 2 February 1449), was a medieval Shafiite Sunni Muslim scholar of Islam "whose life work constitutes the final summation of the science of hadith." He authored some 150 works on hadith, history, biography, tafsir, poetry, and Shafi'ite jurisprudence, the most valued of which being his commentary of the Sahih of Bukhari, titled Fath al-Bari.