This ruler and his wife are interpreted as the title Constantine and Helena in front of the True Cross in the final miniature of the Syriac Lectionary. This ruler burned a library inside a fortress whose name is derived from the words for “eagle” and “taught” in the Daylami dialect. That campaign by this ruler was recounted by one of the Juvayni brothers. (10[1])The death of this ruler necessitated the marriage of his son and Maria Palaiologina. The anonymous Templar of Tyre recounts how Hethum I assisted a campaign by this ruler, who later eliminated a religious sect founded by Ḥasan-i (10[2])(“HUH-sun-ee”) Ṣabbāḥ, nicknamed (-5[1])the “Old Man of the Mountain.” (-5[1])Naṣīr al-Dīn (10[1])al-Ṭūsī (-5[1])convinced (10[1])this ruler to establish an observatory at Marāgha. (-5[6])This ruler besieged the fortress of Alamut, (-5[1])destroying the Assassins. (-5[2])This ruler had Caliph (10[1])al-Mustaṣim trampled (-5[1])to death (10[1])in a carpet. (-5[1])For 10 points, (-5[1])name this founder of the Ilkhanate. (10[3])■END■ (10[5]0[7])