The Vatican

[Frank Fay]

Once you have been christianized, you cannot reverse it but sure you can stay entire game pagan. Also spies can spread heresy when infiltrated as Cleric and governing a province. But pagans can whenever they want decide to adapt Orthodox, Catholic or Muslim religion...

[King Yngvar]

Thank you for your answer, and I have another question: Does the Scandinavians in early start as pagan and (the AI) adobt Christianity. And can I as a pagan Norway convert to Islam if I wanted? (just for fun).