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| Sultan Shahanshah | |||||
 Investiture scene of Berkyaruq, from the 14th-century book Jami' al-tawarikh | |||||
| Sultan of the Seljuk Empire | |||||
| Reign | 1094–1105 | ||||
| Predecessor | Mahmud I | ||||
| Successor | Malik-Shah II | ||||
| Born | 1079/80 Isfahan | ||||
| Died | 1105 (aged 25) Borujerd | ||||
| Issue | Malik-Shah II Zubayda Khatun | ||||
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| House | House of Seljuk | ||||
| Father | Malik-Shah I | ||||
| Mother | Zubayda Khatun | ||||
| Religion | Sunni Islam | ||||
Rukn al-Din Abu'l-Muzaffar Berkyaruq ibn Malikshah (Persian: ابو المظفر رکن الدین برکیارق بن ملکشاه, romanized: Rukn al-Dīn Abuʿl-Moẓaffar Berkyāruq ibn Malik-Šāh; 1079/80 – 1105), better known as Berkyaruq (برکیارق), was the fifth sultan[a] of the Seljuk Empire from 1094 to 1105.
The son and successor of Malik-Shah I (r. 1072–1092), he reigned during the opening stages of the decline and fragmentation of the empire, which marked the rise of Turkoman atabegates and principalities, which would eventually stretch from Kirman to Anatolia and Syria. His reign was marked by internal strife, mainly against other Seljuk princes. By his death in 1105, his authority had largely vanished. His infant son Malik-Shah II briefly succeeded him, until he was killed by Berkyaruq's half-brother and rival Muhammad I Tapar (r. 1105–1118).
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