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| YEAR | DATE | EVENT | HEAD OF STATE |
| 981 | Markgraft of Western Liguria - dinasty Aleramici | markgraft Aleramo | |
| 991 | markgraft Anselmo I | ||
| 1010 | markgraft Anselmo II | ||
| 1027 | markgraft Ottone I | ||
| 1084 | markgraft Bonifacio I | ||
| 1125 | dinasty Del Carretto | markgraft Enrico I | |
| 1182 | markgraft Enrico II | ||
| 1191 | Free Common | ||
| 1353 | Milan Occupation | ||
| 1356 | Free Common | ||
| 1394 | French Occupation | ||
| 1409 | Monferrato Occupation | ||
| 1413 | Union to Republic of Genova | ||
| 1421 | Milan Occupation | ||
| 1435 | Union to Republic of Genova | ||
| 1458 | French Occupation | ||
| 1464 | Milan Occupation | ||
| 1512 | Free Common | ||
| 1798 | French Occupation | ||
| 1815 | Union to Kingdom of Sardegna |