It is in 1861 when Monaco was given the power of sovereignty. Before this grant, it was under the protection of Sardinia in 1815. Therefore it was the authority that governed the nation and its people.
This is the major purpose why the legislature, the judicial, and the political geography requires sovereign power for easier recognition of people. Finally, Monaco France became famous and was able to upscale its casinos and relied on defense that gave it its popularity.