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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1335 | Marquisate - dinasty Gonzaga | marquois Feltrino | |
| 1374 | marquois Guido | ||
| 1399 | marquois Giacomo | ||
| 1441 | marquois Francesco I | ||
| 1484 | marquois Giampietro | ||
| 1501 | Earldom | count Giampietro | |
| 1515 | count Alessandro I | ||
| 1530 | count Francesco III | ||
| 1577 | count Camillo I | ||
| 1595 | count Camillo II (I) | ||
| 1640 | count Alessandro III | ||
| 1644 | count Camillo II (II) | ||
| 1650 | count Alfonso | ||
| 1678 | count Camillo III | ||
| 1727 | 16 august | count Filippo Alfonso | |
| 1728 | countes Ricciarda | ||
| 1737 | Union to Duchy of Modena and Reggio |