In short Włodkowic argumented at 'International Tribunal' during the 1414 Concil of Constance that Teutonic Order cannot justify it's violence and conquest of neighbours just because they are pagans. That was some years before Columbus..
At that time it was customary for European knights to come as guest to Prussia and take part in military expeditions against pagans as a sort of hunting excercise (razzia).
At that time it was customary for European knights to come as guest to Prussia and take part in military expeditions against pagans as a sort of hunting excercise (razzia).
One of the more famous guests was Henry IV Tudor.