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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1311 | Lordship - dinasty Pico | sire Francesco I | |
| 1321 | 27 november | dinasty Bonaccolsi | sire Rinaldo Passerini sire of Mantova |
| 1328 | dinasty Gonzaga | sire Luigi I sire of Mantova | |
| 1354 | 23 december | Lordship - dinasty Pico | sire Francesco II |
| 1399 | sire Francesco III | ||
| 1461 | sire Gian Francesco I | ||
| 1467 | 8 november | sire Galeotto I | |
| 1499 | 7 april | sire Gian Francesco II (I) | |
| 1502 | 6 august | sire Ludovico I | |
| 1509 | 20 december | sire Galeotto II (I) | |
| 1511 | 21 january | sire Gian Francesco II (II) | |
| 1511 | may | sire Galeotto II (II) | |
| 1514 | sire Gian Francesco II (III) | ||
| 1533 | 15 october | sire Galeotto II (III) | |
| 1559 | sire Ludovico II | ||
| 1568 | 18 december | sire Galeotto III | |
| 1590 | sire Federico | ||
| 1597 | 16 august | Principality | prince Federico |
| 1602 | 7 september | prince Alessandro I | |
| 1617 | Duchy | duke Alessandro I | |
| 1637 | 2 december | duke Alessandro II | |
| 1641 | duke Francesco Maria | ||
| 1708 | july | Austrian Occupation | |
| 1710 | may | Union to Duchy of Modena and Reggio |