The investigation primarily contributes to the history of Bavarian-French relations during the Napoleonic era, as the political actions and influence of Anton von Cetto are closely intertwined with the history of the Palatinate-Bavarian house from the fall of the Ancien Régime through the Napoleonic era to the Congress of Vienna. Furthermore, the relationship between the three most important southern German states—Baden, Bavaria, and Württemberg—is taken into account during this politically turbulent and groundbreaking period. Additionally, the reader gains insight into the political decision-making process within the Bavarian government and the diplomatic mechanisms of this significant period, which posed new challenges for diplomats and marked a turning point in the history of diplomacy.