These polygons represent governmental districts (Regierungsbezirke) or comparable units existing in several of the sovereign states of the German Confederation (the Deutscher Bund) in 1820. All were located within the (future) boundaries of the German Empire that would be founded in 1871 ('core Germany'). In 1820, governmental districts formed the middle level administrative units in nearly all of the larger territorial German states: Prussia, Hanover, Saxony, Bavaria, Wurttemberg, Baden, and Hesse-Darmstadt.