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| YEAR | DATE | EVENT | HEAD OF STATE |
| 816 | Count-bishopland | earl bishop Walfredo | |
| 818 | earl bishop Ottone | ||
| 821 | earl bishop Simperto | ||
| 827 | x | ||
| 840 | earles bishop Pancoardo | ||
| 842 | x | ||
| 851 | earl bishop Benedetto | ||
| 878 | earl bishop Lando | ||
| 891 | x | ||
| 913 | earl bishop John | ||
| 924 | earl veescovo Darimberto | ||
| 961 | earl bishop Liutprando | ||
| 972 | earl bishop Olderico | ||
| 1004 | earl bishop Landolfo | ||
| 1031 | earl bishop Ubaldo | ||
| 1074 | earl bishop Arnolfo | ||
| 1078 | earl bishop Usberto | ||
| 1096 | earl bishop Gualtiero | ||
| 1117 | earl bishop Ugo | ||
| 1118 | earl bishop Uberto | ||
| 1182 | Free Common | ||
| 1252 | Lordship - dinasty Pelavicino | sire Oberto | |
| 1266 | dinasty da Dovara | sire Buoso | |
| 1275 | Free Common | ||
| 1307 | Lordship - dinasty Cavalcabò | sire Ugolino | |
| 1312 | 21 january | dinasty Da Correggio | sire Giberto |
| 1315 | o | dinasty Cavalcabò | sire Giacomo |
| 1322 | 30 november | dinasty Viscont | sire Galeazzo I sire of Milan |
| 1327 | 5 july | sire Guglilelmo earl of Monforte sire of Milan | |
| 1329 | 15 january | 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 duke of Milan | |
| 1403 | Lordship - dinasty Cavalcabò | sire Ugolino | |
| 1404 | 13 december | sire Carlo | |
| 1406 | dinasty Fondulo | sire Gabrino | |
| 1420 | Union to Duchy of Milan | ||
| 1499 | Union to Republic of Venice | sire Giberto | |
| 1509 | Union to Duchy of Milan |