ISLAMIC, 'Abbasid Caliphate. temp. Al-Rashid, AH 170-193 / AD 786-809. Dirham (Silver, 25 mm, 2.94 g), citing the vizier of the caliph, Ja'far ibn Yahya Barmaki, Zaranj, AH 179 = AD 795/6. SICA III, 791. Retoned, otherwise, good very fine.

Ja'far ibn Yahya Barmaki (767-803) was a Persian vizier of the Abbasid caliph Harun al-Rashid. He was executed in 803, allegedly for having an affair with al-Rashid's sister, Abbasa.