al-Mansur - Khalīfah of al-Khilāfatu al-‘Abbāsīyah from AD 754 to AD 775
Al-Mansur or Abu Ja'far Abdallah ibn Muhammad al-Mansur ( Arabic: أبو جعفر عبدالله بن محمد المنصور‎‎) was the second Abbasid Caliph reigning from 754 AD to 775 AD.

Al-Mansur is generally regarded as the real founder of the Abbasid Caliphate, and during his reign, a committee, mostly made up of Syriac-speaking Christians, was set up in Baghdad with the purpose of translating extant Greek works into Arabic.

He is also known for founding the 'round city' of Madinat al-Salam which was to become the core of imperial Baghdad.
al-Mansur
Caliph al-Mansur "the Victorious" of the Abbasid Caliphate

Epithet: al-Mansur ("the Victorious")

(1) al-Mansur 772 AD
Obverse: Margin: بسم الله ضرب هذا الدرهم بمدينة السلام سنة خمس و خمسين و مئة Central: لا اله الا الله وحده لا شرك له ¨
Reverse: Margin: محمد رسول الله ارسله بالهدى و دين الحق ليظهره على الدين كله ولو كره المشركون Center: محمد رسول الله بخ بخ
Ref: Album 213.1.
(2) al-Mansur 765-766 AD
Obverse: Margin: بسم الله ضرب هذا الدرهم بمدينة السلام سنة ثمان و أربعين و مئة Center: لا اله الا الله وحده لا شريك له
Reverse: Margin: محمد رسول الله ارسله بالهدى و دين الحق ليظهره على الدين كله ولو كره المشركون Center: محمد رسول الله بخ
Ref: Album 213.1; Lavoix 660