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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1307 | Lordship - dinasty Da Correggio | sire Giberto | |
| 1321 | july | sire Simone | |
| 1347 | dinasty Visconti | sire Giovanni sire of Milan | |
| 1354 | sire Bernaḅ sire of Milan | ||
| 1385 | sire Giangaleazzo sire of Milan | ||
| 1402 | dinasty Terzi | sire Ottone | |
| 1406 | 3 october | dinasty Torelli | sire Guido |
| 1428 | 6 july | Count | earl Guido |
| 1449 | 8 july | earl Cristoforo and Pietroguido I | |
| 1460 | 18 april | earl Guido Galeotto and Francesco Maria | |
| 1479 | 8 october | earl Francesco Maria | |
| 1486 | 7 february | earl Pier Guido II and Achille | |
| 1494 | 11 august | earl Achille | |
| 1522 | 30 november | earles Ludovica | |
| 1539 | 3 october | dinasty Gonzaga | earl Ferrante I |
| 1557 | 17 february | earl Cesare I | |
| 1575 | 17 february | earl Ferrante II | |
| 1621 | 2 july | Duchy | duke Ferrante II |
| 1630 | 5 august | duke Cesare II | |
| 1632 | 26 february | duke Ferrante III | |
| 1678 | 11 january | duke Ferdinando Carlo duke of Mantova (I) | |
| 1692 | 4 may | duke Vincenzo (I) | |
| 1702 | 30 august | duke Ferdinando Carlo duke of Mantova (II) | |
| 1706 | 5 december | duke Vincenzo (II) | |
| 1714 | 27 april | duke Antonio Ferdinando | |
| 1729 | 19 april | duke Giuseppe Maria | |
| 1746 | 4 september | Austrian Occupation | |
| 1748 | 8 april | Union to Duchy of Parma | |
| 1806 | 30 march | Duchy - dinasty Bonaparte | dukes Pauline |
| 1814 | 7 june | Union to Duchy of Parma | |
| 1847 | 17 december | Union to Duchy of Lucca | |
| 1848 | 8 january | Union to Duchy of Modena |