Khwajah

Khwajah Nasir al-Din Tusi (d. 672/1274) is the first to have made kalam a thorough and complete science. Among his masterpieces in this domain is his Tajrid al-iteqed which has preserved its authority among masters of this discipline for more than seven centuries. Numerous commentaries have been written on it by Shi'ites and Sunnis alike. Over and above his genius in the science of kalam, he was one of the outstanding figures of his day in philosophy and mathematics as witnessed by the valuable contributions he made to the intellectual sciences. Moreover, the Maraghah observatory owed its existence to him.