I'm always having fun with weird reformation and protestantism spread. In my game as Gelre, Spain, Italy, Ireland and France are for quite a big part protestant, Aragon converted as well as Sicily, which owns a protestant Rome. The pope fled to the almost all-catholic Germany (except for Cleves, the little territory I own there which became Reformed as well as Gelre). Burgundy converted to Reformed as well. Anyway, England, Scotland, the HRE and Scandinavia are still catholic. Seems history got inverted, and the most faithful catholic nations (historical) turn out to become the biggest heretics the Pope can dream of (I mean, a protestant Italy, France and Castille/Aragon sure must be a popes biggest nightmare)