10 Dinar - Rukn al-dawla

Reverse

La ilah illa Allah/wahda la sharik lahu/al-Muti' lillah Rukn/al-dunya wa'l din abu-'Ali Buwayh, mint name and date in the inner margin, five large broken annulets (crescents?) in the outer margin

Script: Arabic

Lettering:
لا اله الا الله
وحده لا شریک له
المطیع لله رکن
الدوله ابوعلی بویه
بسم الله ضرب هذا الدینار بمحمدیه سنه اثنان وستون وثلاثمائة

Comment

This exceptional ten Dinars coin was struck by the Buwayhids, an Iranian origin dynasty during its Golden age when they controlled most of the Islamic world. Baghdad itself was seized in AH 334 but they kept the Abbasid caliph in place in order to maintain the religious hegemony over the Islamic world. They named themselves as the caliph's protectors but they effectively ended his secular authority and reduced his role to a purely religious one. The needed his presence as the Sunni world would have never accepted a Shi'ite ruler.