major official serving this empire wrote a manual of government called The 
major official serving this empire wrote a manual of government called The Rules for Kings, and was assassinated by the Ismailis. Another ruler of this empire won a major victory at the Battle of Myriocephalon. Under this empire, the Masjed e-Jame, the Great Mosque of Esfahan, was built. Its founder sacked Baghdad in 1055. This empire, administered in the latter half of the twelfth century by the vizier (*) Nizam al-Mulk, lost its independence after being crushed by the Mongols at Kose Dag. Founded by Toghril Beg, this empire, once ruled by Malik Shah, won a major victory against Byzantine forces led by Romanus Diogenes IV at the Battle of Manzikert under its ruler, Alp Arslan. For 10 points, identify this Turkish empire which ruled Anatolia from the 11th to the 14th centuries.
major official serving this empire wrote a manual of government called The Rules for Kings, and was assassinated by the Ismailis.
Seljuk empire or Seljuks