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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1087 | Free Common | ||
| 1285 | Lordship - dinasty Della Gherardesca | sire Ugolino | |
| 1288 | june | dinasty Degli Ubaldini | sire and arcibishop Ruggieri |
| 1288 | december | sire Gualtieri of Brunforte | |
| 1289 | 13 may | dinasty Montefeltro | sire Guido |
| 1293 | july | Free Common | |
| 1312 | Lordship - dinasty Hohenstaufen | sire Henry VII H.R.E. | |
| 1314 | 16 march | dinasty Della Faggiuola | sire Uguccione |
| 1316 | 10 april | dinasty Gherardesca | sire Gaddo |
| 1320 | 1 may | sire Ranieri I | |
| 1325 | 13 december | dinasty Wittlebasch | sire Ludwig IV H.R.E. |
| 1329 | 17 june | Lordship - dinasty Gherardesca | sire Bonifacio Novello |
| 1341 | 2 december | sire Ranieri II Novello | |
| 1347 | 5 july | dinasty Gambacorta | sire Andrea |
| 1354 | sire Franceschetto, Andrea and Bartolomeo | ||
| 1355 | 26 may | dinasty Della Rocca | sire Lodovico |
| 1356 | Free Common | ||
| 1364 | 13 may | Republic - dinasty Dell'Agnello | doge Giovanni |
| 1368 | september | dinasty Gambacorta | sire Pietro |
| 1392 | 20 october | dinasty Appiani | sire Iacopo I |
| 1398 | 5 september | sire Gherardo | |
| 1399 | 18 february | dinasty Visconti | sire Gabriele |
| 1406 | 26 april | Lordship - dinasty Gambacorta | sire Giovanni |
| 1406 | 9 october | Union to Florence | |
| 1494 | 9 november | Republic | |
| 1509 | 8 june | Union to Florence |