He left four sons, who each in turn succeeded to his throne.[295] The youngest, Mahmūd, was only four years of age when his father died; but the ambition of his mother, the Sultana Khātūn Turkān, placed the crown upon his infant head, and the Caliph Muktadi was prevailed on to have his name mentioned in the public prayers. The Sultana marched to Isfahān, preceded by the corpse of Melik Shāh. Berkiyāruk, the eldest prince,[296] was residing there; but, powerless to resist, he retired to Ray, attended by Mu`ayyad ud-Dawla, the son of the late vezīr Nizām ul-Mulk, who warmly espoused his cause, with all the adherents of his family. This support enabled him to return, and Khātūn Turkān was compelled to resign a great part of her treasures as the price of permission to retain control of Isfahān. All her schemes of aggrandisement were soon afterwards terminated by her own death and that of her son, A.H. 487 (1104).
The death of the Caliph Muktadi, which occurred about the same period, induced Berkiyāruk to go to Baghdād, where he confirmed Mostadhhir as the new Caliph, and was in return hailed by him as Sultan of the empire. He enjoyed that dignity for eleven years,[297] but his reign was a perpetual war in which his nearest relatives and all the great nobles of the state were engaged. His usual residence was Baghdād. His brother Mohammad ruled over Āzerbāyjān, while Sanjar established a kingdom in Khorāsān and Transoxiana, whence he extended his conquests over the fallen princes of Ghazna, compelling them to pay him tribute. Berkiyāruk, who appears to have had an excellent disposition, and to have been wanting neither in courage nor conduct, died on a journey from Isfahān to Baghdād,[298] A.H. 498 (1104). He felt his end approaching, and before he expired made his army take the oath of fidelity to his son Melik Shāh II. The young prince was, however, unable to resist his uncle Mohammad, who seized Baghdād treacherously and took him prisoner, A.H. 498 (1104). The reign of Mohammad, which lasted thirteen years, was remarkable only for continual civil disturbances, and for the wars which his generals carried on in Syria against the European armies engaged in their crusade to recover the sacred city of Jerusalem and the Holy Land from the Mohammedans. He died at Isfahān in A.H. 511 (1117), and was nominally succeeded by his son Mahmūd, who was almost immediately reduced by his uncle Sanjar to the condition of a dependant.[299] Sanjar, who had been governor of Khorāsān and its dependencies for the past twenty years, now became Sultan, and as such enjoyed a reign of no less than forty years, A.H. 511–552 (1117–1157).