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| YEAR | DATE | EVENT | HEAD OF STATE |
| 980 | Lordship - dinasty Canossa | sire Tedaldo earl of Mantova | |
| 1012 | sire Bonifacio marquois of Toscana | ||
| 1052 | 7 may | earles Matilde marchesa of Toscana | |
| 1115 | 24 july | Free Common | |
| 1257 | Lordship - dinasty Da Romano | sire Ezzelino | |
| 1259 | dinasty Pelavicino | sire Oberto | |
| 1265 | dinasty Torriani | sire Francesco | |
| 1269 | dinasty Angiò | sire Carlo I King of Napoli | |
| 1281 | Republic | ||
| 1298 | Lordship - dianstia De' Maggi | sire Bernando | |
| 1308 | sire Matteo | ||
| 1311 | dinasty Luxemburg | sire Enrico VII H.R.E. | |
| 1313 | Republic | ||
| 1319 | Lordship - dinasty Amgiò | sire Roberto King of Napoli | |
| 1330 | december | dinasty Luxemburg | sire Giovanni King of Boemia |
| 1332 | dinasty Della Scala | sire Mastino II sire of Verona | |
| 1337 | /TD> | dinasty Visconti | sire Azzone sire of Milan |
| 1339 | 17 august | sire Luchino sire of Milan | |
| 1349 | 24 january | sire Giovanni sire of Milan | |
| 1354 | 6 october | sire Matteo II sire of Milan | |
| 1355 | 26 september | sire Galeazzo II sire of Milan | |
| 1378 | 4 august | sire Bernabò sire of Milan | |
| 1385 | 6 may | sire Gian Galeazzo duke of Milan | |
| 1402 | 3 september | duke Giovanni Maria dike of Milan | |
| 1403 | Lordship - dinasty Rozzone | sire John | |
| 1404 | dinasty Malatesta | sire Pandolfo | |
| 1421 | dinasty Visconti | sire Filippo Maria duke of Milan | |
| 1426 | Union to Republic of Venezia |