Fakhr al-Din al-Razi

Muhammad ibn Umar Fakhr al-Din al-Razi (544–606 AH / 1149–1209 CE) was one of the most brilliant polymaths of Islamic civilization. His Quran commentary Mafatih al-Ghayb (Keys of the Unseen), also called al-Tafsir al-Kabir (The Great Commentary), is a 32-volume work that is encyclopedic in its treatment, engaging philosophy, theology, science, and law alongside the traditional tafsir approach. It is the primary reference for Ash'ari theological interpretation of the Quran. He was also one of the greatest Ash'ari theologians, writing extensive works in kalam (Islamic theology). His al-Arba'in fi Usul al-Din and other theological works represent the peak of Ash'ari scholastic theology.