Al-Mansur Founds Baghdad as Abbasid Capital
In the mid-eighth century, the Abbasid Caliphate sought a new seat of power after overthrowing the Umayyads. Caliph al-Mansur selected a strategic site along the Tigris River in central Mesopotamia for its defensibility, water access, and trade potential. On July 30, 762, construction began on the circular planned city officially named Madinat al-Salam, or City of Peace. Engineers and laborers erected massive walls, a central palace complex, and a grand mosque under the guidance of Persian administrators known as the Barmakids. The project rapidly transformed the location into a bustling metropolis that attracted scholars, merchants, and artisans from across the Islamic world and beyond.
Why it matters: Baghdad quickly emerged as the political and intellectual heart of the Abbasid Caliphate, fostering the Islamic Golden Age through institutions like the House of Wisdom. Its founding established a model for planned imperial cities that influenced urban development for centuries and positioned the region as a global crossroads of knowledge and commerce until the Mongol invasion in 1258.