Historically, the Empire existed from the 10th to the 19th centuries, and had up to 300 members at some points, many of which were so small (e.g. In the Common Sense DLC, the Emperor can appoint up to twelve Free Imperial Cities which are OPMs, cannot be electors, and give the emperor more authority in exchange for trading bonuses (for example, Ulm). The Holy Roman Emperor has various powers at his disposal and a great deal of responsibility to maintaining and protecting the Imperial territorial, religious, and cultural status quo. From these Princes, up to seven are Prince-Electors, who vote on which Prince will be the next Holy Roman Emperor upon the death of the previous one. Members are considered 'Princely states' and their heads are 'Princes'. The Holy Roman Empire ( HRE) is a unique political structure in the game, made up of numerous variously-sized states of the Germanic region and northern Italian Peninsula in Europe. Dark green are Imperial provinces, owned by HRE member-states or otherwise.

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