eastern orthodoxy

I was reading about the Safavid Era conversion of Iran to Shia Islam, and my first thought was to try and come up with a wild alt-hist where something similar happened there but with a form of Christianity instead. To my understanding, before Ismali I, what is now Iran was mostly Sunni, and...

As the title suggests, make Russia as an Eastern Orthodox Theocracy, rather than turned into OTL Soviet Union. The POD is from 1900s.

What if for whatever reason, every Christian church that developed in this ATL retained a style of worship and church buildings that is reminiscent of Eastern Orthodoxy in OTL? If someone who was raised in a different religion visited a church in this ATL, they would encounter a religious...