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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1111 | Count of Duchy of Saxe | ||
| 1212 | Principality - dinasty Ascani | prince Enrico I | |
| 1252 | prince Bernardo I | ||
| 1287 | prince Bernardo II | ||
| 1324 | prince Bernardo III | ||
| 1348 | prince Bernardo IV | ||
| 1354 | dinasty Stade | prince Enrico IV | |
| 1377 | prince Ottone III | ||
| 1404 | prince Bernardo V | ||
| 1410 | prince Bernardo VI | ||
| 1468 | prince Giorgio I | ||
| 1474 | prince Ernesto | ||
| 1516 | prince John II | ||
| 1551 | prince Carlo | ||
| 1561 | prince Bernardo VII | ||
| 1570 | prince Gioacchino Ernesto | ||
| 1586 | prince Cristiano I | ||
| 1630 | prince Cristiano II | ||
| 1656 | prince Vittorio Amedeo | ||
| 1718 | prince Carlo Federico | ||
| 1721 | prince Vittorio Federico | ||
| 1765 | prince Federico | ||
| 1796 | prince Alessio | ||
| 1806 | Duchy | duke Alessio | |
| 1834 | duke Alessandro Carlo | ||
| 1863 | duke Leopoldo II | ||
| 1871 | duke Federico I | ||
| 1904 | duke Federico II | ||
| 1918 | duke Edoardo | ||
| 1918 | duke Gioacchino Ernesto | ||
| 1918 | 9 november | German State | |
| 1945 | Part of Eastern Germany | ||
| 1990 | 3 october | German State |