Krall
Banned
Another possibility is that a country gives the Holy See refuge during an occupation of Rome. Again, that's open to discussion.
Hmm, that happened in the Map Continuation 2 timeline. Catholic Spain annexed the Papal States, then turned Protestant. The Pope fled to Catholic France, but then fled to France's American colonies when war with Spain broke out.
The Holy See is presently just west of Florida [or 'Napolea', as it's call in the MC 2 TL].