The Hohenzollern family ruled the Margraviate of Brandenburg (since 1415), the Duchy of Prussia (1525 - 1701), the Kingdom of Prussia (1701 - 1918) and they ruled the German Empire (1871 - 1918). However, they were dethroned following World War I.
Leading figures include:
- The Great Elector Frederick William, 1620-1688, grandfather to
- Frederick the Great, 1712-1786, king of Prussia since 1740
- Kaiser Wilhelm II, 1859-1918, last king of Prussia (since 1888)
- Clark, Christopher. Iron Kingdom: The Rise and Downfall of Prussia, 1600-1947 (2009), standard scholarly history