In the year 1800, the Prussian government was a duchy in the Holy Roman Empire, with its king called King Frederick III of Prussia. The duchy was a form of government used since the creation of the Holy Roman Empire in the 900s, and had been in use in Prussia since the 1300s. In the year 1801, Prussia left the HRE. King Frederick decided a new government was needed because Prussia was not in the HRE. Frederick created an empire modeled on the Roman Province system. Frederick became the Emperor of Prussia, and divided the kingdom into six provinces: Brandenburg, Prussia, Pomerania, Silesia, Rhineland, and Poland. Frederick III controlled Brandenburg and the capital, Berlin, while his wife controlled the Province the Prussia, with her capital based at Danzig. Emperor Frederick gave control o