Madeleine Birchfield
Banned
Challenge: Have the seat of the Pope/Catholic Church be in Canterbury instead of Rome, without schisms/antipopes.
Well the Umaayad collapse will be interesting. France will likely become a battleground between the two faiths and Italy could see total conversion given it's closer proximity to the Muslim core and the smaller populationOnly one I can think of is a successful Muslim invasion of France, followed by Italy. The Pope, chooses Britain over Germany as the best place to set up shop, and establishes the Papacy-in-Exile in Britain.
Whilst not very powerful, it would be interesting to see a Free Papacy that tries to organise Crusades. Whilst I'm not sure it WOULD lead to this, it'd be interesting if a Free Papacy was subordinate to the Ecumenical Patriarch (thus avoiding the Schism as Roman political support would be deeply useful). It might also be interesting if the Latin Church had people leaving to join the Pope in Canterbury, forming a sort of exodus population that sought to retake their homelands.