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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1251 | Marquisate - dinasty Del Carretto | marquois Giacomo | |
| 1268 | marquois Antonio I | ||
| 1297 | marquois Enrico | ||
| 1336 | marquois Giorgio | ||
| 1359 | marquois Aleramo | ||
| 1367 | marquois Emanuele | ||
| 1385 | marquois Carlo | ||
| 1390 | marquois Lazzarino I | ||
| 1392 | marquios Lazzarino II | ||
| 1402 | marquois Galeotto I | ||
| 1450 | marquois John I | ||
| 1466 | marquois Galeotto II | ||
| 1466 | marquois Alfonso I | ||
| 1528 | marquois John II | ||
| 1535 | marquois Alfonso II | ||
| 1564 | Principality | prince Alfonso II | |
| 1583 | prince Alessandro | ||
| 1596 | prince Sforza Andrea | ||
| 1598 | dinasty Habsburg | prince Felipe III King of Spain | |
| 1621 | 31 march | prince Felipe IV King of Spain | |
| 1665 | 17 september | prince Carlos II King of Spain | |
| 1700 | 16 november | dinasty Borbone | prince Felipe V King of Spain |
| 1701 | French Occupation | ||
| 1709 | Union to Duchy of Milan | ||
| 1748 | Union to Republic of Genua |