What French empire was the  Imperial Bonapartist regime of  Charles-Louis Napoléon Bonaparte?
Second French Empire: The French Second Empire (French: "Second Empire" ) was the Imperial Bonapartist regime of Napoleon III from 1852 to 1870, between the Second Republic and the Third Republic, in France. Napoleon III: Louis-Napoléon Bonaparte (born Charles-Louis Napoléon Bonaparte; 20 April 1808 – 9 January 1873) was the President of France from 1848 to 1852 and, as Napoleon III, the Emperor of the French from 1852 to 1870.
Second Empire