The wedding between Infanta Maria Anna of Braganša and the Protestant Crown Prince of Luxembourg, Wilhelm of Nassau-Weilburg, was a hazardous one and subject to difficult negotiations envolving Rome.
Eventually it was agreed that the Infanta could retain the practice of the catholic faith, the couple's sons would be raised as protestants and the daughters as catholics.
As the couple only had daughters...
I suppose it would be a bit odd for a family where one half follows one religion and the other half another religion, but if they find it easy
Some time ago, I was googling through Wikipedia and ran into an article about a Catholic princess who got excommunicated after marrying a Protestant prince (a German Lutheran).
I know it's a vague question, but does anybody know who she might have been, and what the exact reason was for excommunication? After all, contracting an interfaith union does not, in itself, constitute grounds for excommunication.
Marrying outside the Church or failing to obtain a dispensation might ... But isn't that simply a state of *grave sin*, as opposed to cause for getting excommunicated? Did she fail to make a promise to raise all the prospective children born to the union in the Catholic faith?
If I understand correctly, this requirement, as a term for a dispensation, has not been uniform or consistent in church history. It became official in canon law only in 1910, was strongly resisted in Germany, and the pope had to make an exception there.