نظام الملك
After Alp Arslan had consolidated his power in the Sejluk realm, he appointed Abu Ali Hasan as his vizier who would remain in that position throughout the reigns of Alp Arslan (1063–1072) and Malik-Shah I (1072–1092). Abu Ali Hasan was also given the title of "Nizam al-Mulk" ("Order of the Realm").