Question regarding the Papal Schism

The Papal or Western Schism lasted from 1378 to 1417 between those who supported the Papal claimants in Rome and Avignon (and, from 1409, Pisa). I know the map generally given is slightly inaccurate. And I also know the allegiance of certain realms to certain popes had just as much, if not more, to do with politics as with religion. But the basic gist of my question is this:

If, say, during this time period, a kingdom which supported the Roman pope wanted to make an alliance (formal or marriage) with a country that supported the Avignon pope, or vice versa, would there have been religious difficulties preventing it, like an alliance between a Catholic and a Protestant kingdom? And could they backtrack easily?

I'll admit, this isn't my normal area of expertise, so any opinions would be highly appreciated.
 
In my opinion, ofcourse it would be a bit more difficult because during this time many important royal marriages were overseen by the papacy and royal marriages were the most common way of solidifying an Alliance. But in practicality most European countries hated the Avignon pope because they believed it was a French attempt to control the papacy and exert more influence so the situation never really became apparent. If you still wanted an alliance I don't believe there'd be any sort of outroar; perhaps a few hoops to jump through but that would be it.
 

PhilippeO

Banned
I suspect they would backtrack easily. It's mostly politic, so if possibility to marry French princess suddenly open to you, you become French ally and switch support to Avignon pope.
 
I suspect they would backtrack easily. It's mostly politic, so if possibility to marry French princess suddenly open to you, you become French ally and switch support to Avignon pope.
Not necessarily: Gian Galeazzo Visconti married Isabelle de Valois in 1359, but this did not influence his politics afterward. He always played on both the French and the HRE table, and his support went to the pope in Rome or the Avignonese one according to opportunity.
The Great Western Schism was always a political rather than a religious matter
 
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