Provinces of Prussia

The Provinces of Prussia constituted the main administrative divisions of Prussia upon the Stein-Hardenberg Reforms.

Following the dissolution of the Holy Roman Empire in 1806 and the Congress of Vienna in 1815, the various German states gained nominal sovereignty. However, the reunification process that culminated in the creation of the German Empire in 1871, produced a country that was constituted of several principalities and dominated by one of them, the Kingdom of Prussia after it had ultimately defeated its Austrian rival. Its territory covered some 60 percent of the territory that was to become the German Reich.

The German Confederation was established at the Congress of Vienna in 1815 and the Kingdom of Prussia was a member until the dissolution in 1866 following the Austro-Prussian War.

The Prussian state was initially subdivided into ten provinces. The Prussian government appointed the heads of each province known as Oberpräsident (i.e. upper president). The Oberpräsident represented the Prussian government in the province, and was busy with implementing and supervising central prerogatives of the Prussian government. The provinces of Prussia were further subdivided into government districts (Regierungsbezirke), subject to the upper presidents. As to self-rule each province also had a provincial diet (Provinziallandtag in German), the members of which were elected in indirect election by county councillors and city councillors of the constituent rural counties and independent cities.

Western Provinces:

In 1822 the Rhine Province was created from the Lower Rhine and Jülich-Cleves-Berg provinces.

Eastern Provinces (East Elbia):

...
Wikipedia