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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1446 | Marquoisate - dinasty Gonzaga | marquois Gianfrancesco | |
| 1496 | marquois Ludovico | ||
| 1540 | 1 july | marquois Vespasiano | |
| 1573 | Duchy | duke Vespasiano | |
| 1591 | 26 february | dukess Isabella | |
| 1637 | 10 february | Carafa dinasty | dukess Anna |
| 1644 | 24 september | duke Nicola | |
| 1684 | Spanish occupation | ||
| 1702 | Union to Duchy of Guastalla |