Originally Posted by Brother
I thought Protestant marriages were not considered a Sacrament, only natural marriage.
Pope Pius XI, Casti Connubii:
39. And since the valid matrimonial consent among the faithful was constituted by Christ as a sign of grace, the sacramental nature is so intimately bound up with Christian wedlock that there can be no true marriage between baptized persons "without it being by that very fact a sacrament."