alternatehistory.com

Yes, this is basically what if Hazrat* Shapur II The Great never converted to Christianity during year 310 of the Messiah Era*, and in his place, a Roman Emperor does.

Will Christianity still spread East into India and China? Will Europe turned into a Christian majority continent instead of today's Roman Pantheon and Odinism? Will the West - South - East schism of Persian, Ethiopian, and Chinese rites of Christianity still occur or would it something else?

OOC :
Hazrat = Persian for Saint
Messiah Era = OTL Anno Domini, but since Anno Domini is Latin and this ATL Christianity is Persianized instead of Latinized
Top