Key Facts
- Duration
- 1157–1806 (649 years)
- Area (c. 1535)
- ~26,000 km²
- Population (c. 1535)
- ~400,000
- Electoral status granted
- Golden Bull of 1356
- Hohenzollern accession
- 1415
- Duchy of Prussia inherited
- 1618
Imperial Zenith Metrics
Territorial Scale Comparison
Peak area vs modern sovereign states
Historical Trajectory
Phase I: Rise
Brandenburg emerged from the Northern March, carved out of Slavic Wendish territory and formally established as a margraviate in 1157 under Albert the Bear. Its margraves were recognized as prince-electors in the Golden Bull of 1356, granting them a formal role in selecting the Holy Roman Emperor. The House of Hohenzollern acquired the territory in 1415, moving the capital from Brandenburg an der Havel to Berlin in 1417 and consolidating its governance.
Phase II: Zenith
Under the Hohenzollerns, Brandenburg's influence expanded significantly in the 17th century. The inheritance of the Duchy of Prussia in 1618 created Brandenburg-Prussia, doubling the dynasty's territorial base. This combined state developed a disciplined military and centralized administration, positioning its rulers as major actors in Central European politics and laying the institutional groundwork for eventual elevation to a full kingdom.
Phase III: Decline
The dissolution of the Holy Roman Empire in 1806 formally ended the Margraviate of Brandenburg. After the Napoleonic Wars, it was reorganized as the Prussian Province of Brandenburg in 1815. The Hohenzollern-led Kingdom of Prussia subsequently drove German unification, forming the North German Confederation and then the German Empire in 1871, making Brandenburg the institutional ancestor of modern Germany.
Notable Imperial Reigns
Selected rulers mapping the empire’s trajectory