| YEAR | DATE | EVENT | HEAD OF STATE |
| 1137 | Count | earl Sizzo III | |
| 1160 | earl Gunther II | ||
| 1197 | earl Henry II | ||
| 1236 | earl Gunther VII | ||
| 1274 | earl Henry V | ||
| 1285 | earl Henry VII | ||
| 1324 | earl Henry X and Gunther XXI | ||
| 1336 | earl Gunther XXV and Gunther XXI | ||
| 1349 | earl Gunther XXV | ||
| 1368 | earl Gunther XXIX | ||
| 1416 | earl Henry XXIV | ||
| 1444 | earl Henry XXVI | ||
| 1488 | earl Henry XXXI | ||
| 1526 | earl Gunther XL | ||
| 1552 | earl Gunther XLI | ||
| 1583 | Count of Schwarzburg-Rudolstadt | earl Albert VII | |
| 1605 | earl Louis Gunther I and Charles Gunther | ||
| 1631 | earl Louis Gunther I and Albert Gunther | ||
| 1634 | earl Louis Gunther I | ||
| 1646 | earl Albert Anthony | ||
| 1709 | 26 may | Principality | prince Albert Anthony |
| 1716 | 30 december | prince Ludwig Friedrich I | |
| 1718 | 24 june | prince Friedrich Anton | |
| 1744 | 1 september | prince Johann Friedrich | |
| 1767 | 10 july | prince Ludwig Günther IV | |
| 1790 | 29 august | prince Friedrich Karl | |
| 1793 | 13 april | prince Ludwig Friedrich II | |
| 1807 | 28 april | prince Friedrich Günther | |
| 1867 | 28 june | prince Albrecht | |
| 1869 | 26 november | prince Georg Albrecht | |
| 1890 | 19 january | prince Günther Viktor | |
| 1918 | 22 november | Union to German State of Thuringia |