BETA ZEN
Al-Mansur
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Abū Jaʿfar ʿAbd Allāh ibn Muḥammad al-Manṣūr usually known simply as by his laqab al-Manṣūr (المنصور) was the second Abbasid caliph, reigning from 754 to 775, succeeding his brother al-Saffah. He founded the 'Round City' of Madinat al-Salam, which was to become the core of imperial Baghdad.