alternatehistory.com

I'm working on a new timeline. It will be my first serious timeline (sorry, Hitler), and I've been percolating ideas for a while now. The POD will need to be very early (I'm thinking something that makes the Pentarchical Church to hold). What are some suggestions to make this happen, or things that could cause this? Perhaps a more successful Nestorianism in Persia? Could Nestorians become the majority there? Anything would be helpful, as I want to make this as prepared a timeline as possible.
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