| YEAR | DATE | EVENT | HEAD OF STATE |
| 1552 | Count | earl John Gunther I | |
| 1586 | earl Christian Gunther I | ||
| 1642 | earl Louis Gunther II, Anthony Gunther I and Christian Gunther II | ||
| 1666 | earl Louis Gunther II, Anthony Gunther II and Christian William | ||
| 1681 | earl Anthony Gunther II and Christian William | ||
| 1697 | 13 september | Principality | prince Christian Wilhelm and Anthony Gunther II |
| 1716 | Principality | prince Christian Wilhelm | |
| 1721 | 10 may | prince Günther XLIII | |
| 1740 | 28 november | prince Heinrich XXXV | |
| 1758 | 6 november | prince Christian Günther III | |
| 1794 | 14 october | prince Günther Friedrich Karl I | |
| 1835 | 19 august | prince Günther Friedrich Karl II | |
| 1880 | 17 july | prince Karl Günther II | |
| 1909 | 28 march | prince Gunther II of Rudolstadt | |
| 1918 | 22 november | Union to Germany |