in about 50 or 70 years im moving the capital out of barbarian backwater Constantinople and into Baghdad, which is the center of learning in the whole world at this point in history (about 920 AD), near enough to both Babylon and the former Parthian empire capital of Ctesiphon (it actually Replaced Ctesiphon) and in the middle between my Greek core and the Persian provinces. The perfect place to create the new composite culture and religion of the greco-persian empire
Fuck it this region is so poorly defined in ownerless, I'm going to make the Basileia Alexandrinoí canon. Stretching from Epirus to the Indus River at its peak, governed by an electoral imperial system and a composite culture ruling class of centuries intermarried Greek and Iranian nobles. Probably lasted until the 20th century before collapsing like the Ottoman Empire. Has a formerly Christian Islamic synchretic religion called Alexandrianism that still lingers