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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1190 | Free Common | ||
| 1312 | 17 april | Count - dinasty Anjou | earl Roberto I King of Napoli |
| 1317 | dinasty Savoy | earl Filippo | |
| 1339 | dinasti Aleramici | earl John II marquois of Monferrato (I) | |
| 1340 | dinasty Visconti | earl Luchino | |
| 1349 | earl Giovanni | ||
| 1354 | earl Galeazzo II | ||
| 1356 | dinasti Aleramici | earl John II marquois of Monferrato (II) | |
| 1372 | dinasti Paleologi | earl Secondotto | |
| 1378 | dinasty Visconti | earl Gian Galeazzo | |
| 1387 | april | earles Valentina | |
| 1406 | dinasty Orleans | earl Carlo duke of Orlenas (I) | |
| 1415 | dinasty Visconti | earles Filippo Maria duke of Milan | |
| 1422 | dinasty Orleans | earl Carlo duke of Orlenas (II) | |
| 1438 | dinasty Sforza | earles Francesco | |
| 1446 | dinasty Orleans | earl Carlo duke of Orlenas (III) | |
| 1465 | dinasty Valois | earl Luigi XI King of France | |
| 1483 | 30 august | earl Carlo VIII King of France | |
| 1498 | 7 april | earl Luigi XII King of France | |
| 1507 | dinasty Sforza | earl Massimiliano duke of Milan | |
| 1515 | dinasty Valois | earl Francesco king of France | |
| 1521 | dinasty Sforza | earl Francesco II duke of Milan | |
| 1525 | dinasty Habsburg | earl of Carlo V H.R.E. | |
| 1530 | Union to Principality of Piemonte |