Al-Mansur, Almanzor or Abu Ja'far Abdallah ibn Muhammad al-Mansur (712–775; ) was the second Abbasid Caliph. He was born at al-Humaymah, the home of the 'Abbasid family after their emigration from the Hejaz in 687–688. "His father, Muhammad, was reputedly a great-grandson of Abbas ibn Abd al-Muttalib, the youngest uncle of Mohammad; his mother was a Berber woman.". He reigned from 754 until 775. In 762 he founded as new imperial residence and palace city Madinat as-Salam, which beca… (More on Al-mansur)