The rulers of Brandenburg are usually dated from the reign of Albert I the Bear who crusaded against the pagan Wends and essentially founded the Margraviate of Brandenburg. Brandenburg would inherit Albert's Prince-Elector rights though it was only referred to as a Principality following the Treaty of Copenhagen which closed the Fifty Years War.
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Albert I the Bear | (1157-1170) | |
| Otto I | (1170-1184) | |
| Otto II the generous | (1184-1205) | |
| Albert II | (1205-1220) |
Brandenburg divided between the sons of Albert II: John I and Otto III.
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Valdemar I the Great | Sole-rule (1318-1319) | |
| Henry II the child | (1319-1320) |
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Louis I (Louis V of Bavaria) | (1323-1351) | |
| Louis II | (1351-1356) | |
| Otto VII | (1356-1373) |
Otto VII sells the neglected Margrave to the Luxembourgs as an act of spite toward Emperor Olaf.
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Charles I | 
|
(1373-1374) |
| Wenceslaus I
Emperor Wenceslaus |
|
(1374-1400) |
| Charles II
Emperor Charles IV |
|
(1400-1426) |
| Sigismund I
Emperor Sigismund I |
|
(1426-1437) |
| Matthew
Emperor Matthew |
|
(1437-1444) |
| John VI | 
|
(1444-1478) |
| Sigismund II
Emperor Sigismund II |
|
(1478-1502) |
| John VII
Emperor John I |
|
(1502-1536) |
| Wenceslaus II | 
|
(1536-1540) |
| Joanna (regent for Henry of Prague, then Henry VIII) |
|
(1540-1562) |
| Henry III | 
|
(1562-1580) |
| Henry IV | 
|
(1580-1602) |
| Charles III | 
|
(1602-1620) |
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Anna of Nassau | 
|
(1620-1643) |
| George I | (1643-1659) |
George I is executed by a radical Republican Diet as the country descends into chaos during the Brandenburg Civil War (1653-1659). The 'Commonwealth' would last until it was broken up by the Danish army in 1664. Wolfgang Casimir of Isenberg is installed by the Danes.
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Wolfgang Casimir | (1665-1672) |
Wolfgang Casimir's reactionary regime falls as passions are inflamed by Henry X of Luxembourg retaking Bohemia and his subsequent liberal regime there. A Svealandic army restores order and plants George August of Mansfeld on the throne.
| Monarch | Portrait | Dates of Rule |
|---|---|---|
| Georg August | (1673-1694) | |
| Frederick I | (1694-1725) | |
| Ernst I | (1725-1758) | |
| Frederick II William | (1758-1770) | |
| Albert III | (1770-1803) | |
| Frederick III Augustus | (1803-1834) | |
| Frederick IV Ernst | (1834-1870) | |
| George II | (1870-1885) | |
| Frederick V Casimir | (1885-1906) | |
| Louise of Hohenlohe (regency) | (1906-1910) | |
| Ernst II | (1906-1938) | |
| Frederick VI | (1938-1979) | |
| Frederick VII | (1979-2003) | |
| Ernst III | 
|
(2003-) |
| ||||||||||||||||||||
