In the aftermath of World War I, the Prussian districts of Eupen and Malmedy (Belgium) were annexed by Belgium in 1925, thereby causing the presence of a German-speaking minority.
Administration
After the Napoleonic Wars and the 1815 Congress of Vienna, the Prussian lands were re-arranged into ten provinces, three of them—East Prussia, West Prussia and the Grand Duchy of Posen—beyond the borders of the German Confederation. The provinces were internally divided into up to six Regierungsbezirke and further into the districts on local level, headed by a Landrat administrator. The districts usually took the name of their capital (Kreisstadt), seat of the administrative office (Landratsamt). A typical district had a rough diameter of Шаблон:Convert, in order to ensure that even the remotest villages could be reached by carriage within a day, though few were circular in shape. In some areas, larger districts were split into two smaller districts or were resized with neighboring ones.
Larger cities usually retained their self-administration according to traditional German town law and formed exempt urban districts (Stadtkreise) comparable to independent cities. Often these cities also served as the administrative seat responsible for the smaller towns and villages incorporated into the surrounding rural districts, which then were called (Landkreise) for the purpose of differentiation (e.g. Stadtkreis and LandkreisKönigsberg). The number of urban districts increased in the course of the Industrial Revolution and the following urbanization from the 1830s onwards.