Answer
Al-Hadi, the Abbasid caliph, was born in the Abbasid Caliphate, not confined to a specific city or exact geographical location. This vast caliphate encompassed most of the Middle East, including present-day Iraq, Syria, Lebanon, Palestine, Jordan, Saudi Arabia, Yemen, and portions of North Africa. During his time, the Abbasid Caliphate represented a powerful central authority in the Islamic world, with its capital in Baghdad.