This article addresses the onset of a decades-long conflict between the ruler of the Holy Roman Empire King Ludwig IV of Bavaria and the papacy. When Ludwig intervened on behalf of antipapal factions in northern Italy in 1323, Pope John XXII issued an ultimatum demanding that Ludwig immediately cease to exercise the royal power and title on the pretext that he had never received papal approval of his royal election. Failure to comply meant that the king would fall under sentence of excommunication. Ludwig responded with nearly identical appeals issued in Nuremberg and Frankfurt. Against previous arguments that these appeals were either legal documents operating within the confines of Roman Canon law or artifacts of protomodern realpolitik, this article argues that the “Nuremberg” and “Frankfurt Appellations” emerged from the king's preoccupation with his honor. His Appellations utilized the language and form of Roman Canon law to defame his opponent while he sought to ennoble and justify his actions with a rhetoric mirroring that in supposed repositories of imperial customary law such as the Sachsen- and Schwabenspiegel. In arguing that German custom superseded the jurisdiction of papal law in his Appellations, Ludwig elevated a discourse concerning royal elections to the highest levels of imperial politics where it would remain and find inclusion, in intent if not precise formulation, in the famed Golden Bull of 1356.