Nizam al-Mulk nĭz´əm äl mûlk [key], c.1018–92, vizier (1063–92) under two Seljuk (see Turks) sultans. Of Persian descent, he was early educated in administration, serving the Ghaznavids sultans. By 1059 he was chief administrator of Khorasan; in 1063 the Seljuks made him their vizier. Nizam al-Mulk remained in that position throughout the reigns of Alp Arslan and Malikshah. His power peaked under the latter, when he wrote the extensive treatise entitled Siyasat-nameh, or
Book of Government.A devout Sunni Muslim, Nizam al-Mulk also founded a number of theological schools. He was assassinated in 1092.
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