Assertion: caliph's power | /r/CapableOf | restore the authority of the caliphate
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Source sentences:
text: In 1055 the Abbasids were overpowered by the Seljuqs, who took what temporal power may have been left to the caliph but respected his position as the titular leader, restoring the authority of the caliphate, especially during the reigns of al-Mustarshid (1118–35), al-Muqtafī, and al-Nāṣir.