 Mettmann remained French for about 10 years and became a part of Prussia's Province of Jülich-Cleves-Berg following Napoleon's defeat at the Battle of Leipzig in 1813.As the result of the Congress of Vienna (1814–15), in 1822 it was adsorbed into the Prussian Rhine Province.However, the Prussian rulers did not prove to be very popular, as during the bread-riots of 1848–49 and the ensuing political upheavals, which hit the district of Düsseldorf among the hardest, policing was done from Berlin, excluding local accountability.