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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1211 | Count - dinasty Ascani | earl Ermanno II | |
| 1247 | earl Alberto | ||
| 1283 | earl Ottone earl of Plassenburg | ||
| 1285 | earl Ermanno V | ||
| 1319 | earl Federico I | ||
| 1365 | earl Federico II | ||
| 1381 | dinasty Wettin | earl Federico I p.e of Saxe | |
| 1423 | 2° Principality Electoral of Saxe | p.e. and earl Federico I | |
| 1428 | p.e. and earl Federico II | ||
| 1464 | p.e. and earl Ernesto | ||
| 1486 | p.e. and earl Federico III | ||
| 1525 | p.e. and earl John | ||
| 1532 | p.e. and earl John Federico I | ||
| 1547 | Duchy | duke John Federico I (ex p.e. of Saxe) | |
| 1554 | duke John Federico II | ||
| 1572 | duke John Guglielmo | ||
| 1573 | duke John | ||
| 1605 | duke John Ernesto I | ||
| 1626 | duke Guglielmo | ||
| 1662 | duke John Ernesto II | ||
| 1683 | 25 may | duke Johann Ernst III | |
| 1707 | 20 june | duke Wilhelm Ernst | |
| 1728 | 26 august | duke Ernst August I | |
| 1748 | 19 january | duke Ernst August II | |
| 1758 | 28 may | duke Carl August | |
| 1815 | 21 april | Greatduchy | greatduke Carl August |
| 1828 | 14 june | greatduke Carl Friedrich | |
| 1853 | 8 july | greatduke Carl Alexander | |
| 1901 | 5 january | greatduke Wilhelm Ernst | |
| 1918 | 9 november | Union to German State of Thuringen |