Al-Saffah in the context of "Al-Mansur"

Khalid ibn Barmak (709–781/82; Arabic: خالد بن برمك) was the first prominent member of the Barmakids, an important Buddhist family from Balkh, which converted to Islam and became prominent members of the Abbasid court in the second half of the 8th century. Khalid himself converted to Islam at the Umayyad court in the 720s, but joined the nascent Abbasid revolutionary movement in Khurasan, and played a significant role in the Abbasid Revolution that toppled the Umayyads. He enjoyed close relations with the first Abbasid caliph, al-Saffah, functioning as his chief minister and introducing innovations in record-keeping. Under al-Saffah's successor, al-Mansur, Khalid's influence decreased, but he still occupied significant provincial governorships in Fars, Tabaristan, and Mosul. As an administrator, he distinguished himself for his fairness, especially in matters of taxation, and was a popular governor. He appears to have briefly fallen into disgrace around 775, but he managed to recover, helped by the rapid rise of his son, Yahya. Khalid's ties to the Abbasid dynasty were soon strengthened when his grandson, al-Fadl ibn Yahya, became the foster-brother of the future caliph Harun al-Rashid, while Yahya became the prince's tutor. Khalid died in 781/2, shortly after returning from an expedition against the Byzantine Empire.

The Barmakids (Persian: برمکیان Barmakiyân; Arabic: البرامكة al-Barāmikah), also spelled Barmecides, were an influential Iranian family from Balkh, where they were originally hereditary Buddhist leaders (in the Nawbahar monastery), and subsequently came to great political power under the Abbasid caliphs of Baghdad. Khalid, the son of Barmak became the chief minister (vizier) of al-Saffah (r. 750–754), the first caliph of the Abbasid dynasty. His son Yahya aided Harun al-Rashid in capturing the throne and rose to power as the most powerful man in the Caliphate.

The Barmakids were remarkable for their majesty, splendor and hospitality. They are mentioned in some stories of the One Thousand and One Nights.