If Frederick converted to Catholicism in his youth 1720s (but obviously let his protestant nobles keep their practices or that's asking for trouble), how would this affect the European world?
Assume these things remain like OTL
(I mean, it's plausible to butterfly away the War of Austrian Succession with our POD, but let's suppose the butterflies allow it to happen in some form)
House of Hannover and House of Hapsburg retain or at least try to retain their odd alliance.
Savoyads remain allied to hapsburgs
Anyone who doesn't meet with Frederick post POD or have their marriages changed post POD has the same children for the next 30 years. Or at least, children "in the ballpark" gene wise and with the same names. So if he does;t marry Elizabeth in TTL, she marries someone else, then she has different children. Charles VI, Holy Roman Emperor, is still married to the same person and doesn't bone his wife more or less due to the Electorate of Brandenburg converting, so he has the same children. Someone who met Frederick in TTL and is convinced to try harder for a son can have different children.
Charles VI, Holy Roman Emperor dies in 1740.
France and Bavaria still challenges Austria by trying to make Charles of Bavaria Holy Roman Emperor. France also tries to take away Tuscan with... whatever logic they had in OTL
Anything else is up for grads. Does Maria Therese have her OTL Husband or does Frederick seem like a more appealing choice? Maybe Charles VI doesn't invade the Ottomans. Maybe a succession happens and it's short.
Assume these things remain like OTL
(I mean, it's plausible to butterfly away the War of Austrian Succession with our POD, but let's suppose the butterflies allow it to happen in some form)
House of Hannover and House of Hapsburg retain or at least try to retain their odd alliance.
Savoyads remain allied to hapsburgs
Anyone who doesn't meet with Frederick post POD or have their marriages changed post POD has the same children for the next 30 years. Or at least, children "in the ballpark" gene wise and with the same names. So if he does;t marry Elizabeth in TTL, she marries someone else, then she has different children. Charles VI, Holy Roman Emperor, is still married to the same person and doesn't bone his wife more or less due to the Electorate of Brandenburg converting, so he has the same children. Someone who met Frederick in TTL and is convinced to try harder for a son can have different children.
Charles VI, Holy Roman Emperor dies in 1740.
France and Bavaria still challenges Austria by trying to make Charles of Bavaria Holy Roman Emperor. France also tries to take away Tuscan with... whatever logic they had in OTL
Anything else is up for grads. Does Maria Therese have her OTL Husband or does Frederick seem like a more appealing choice? Maybe Charles VI doesn't invade the Ottomans. Maybe a succession happens and it's short.