alternatehistory.com

Relatively simple question - what is the last point that one could save Greco-Roman polytheism? Not in the sense that the Roman Empire or any of its successors resists Christianization, but in that a particular group or region of some notable size in some corner of Europe manage to maintain their religion, rather than converting to Christianity or Islam or something. Also, how would such a pagan kingdom interact with the Christian and Muslim world? Where would be the most likely area for such a remnant to persist for at least a few centuries?
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