In 1817, the plenipotentiaries of the prince of Monaco and of the king of Sardinia signed in Turin the two treaties which established and regulated the protectorate of Sardinia on the principality of Monaco which lasted until 1860 when the ancient Savoy county of Nice and the villes libres of Menton and Roquebrune were annexed to France. The treaties were ratified by king Victor Emmanuel I of Sardinia on 8 and 11 november 1817 in the royal hunting castle of Stupinigi, close to Turin. Today, almost two centuries after the treaties of Stupinigi, we want to commemorate the most significant events that marked this period so interesting from a historical and diplomatic profile. This essay examines in detail some aspects of the Franco-Sardinian-Monegasque diplomatic and territorial controversy under the Stupinigi treaties. (full text in French)