These polygons represent 11 provinces existing in the sovereign states of the German Confederation (the Deutscher Bund) in 1850, which were located within the (future) boundaries of the German Empire that would be founded in 1871 ('core Germany'). There are no changes compared to 1848, when three new provinces had been introduced as administrative units within the state of Hesse-Darmstadt, so the layer still represents the two states of Prussia and Hesse-Darmstadt.