abstract:Abu Ali al-Hasan al-Tusi Nizam al-Mulk (April 10, 1018 – October 14, 1092), better known as Khwaja Nizam al-Mulk Tusi ( - Khwāğa Nizāmu l'Mulk al-Ṭusī) was a PersianGustave E. Von Grunebaum, Katherine Watson, Classical Islam: A History, 600 A.