| YEAR | DATE | EVENT | HEAD OF STATE |
| 1096 | Count - dinasty Montaigu | earl Lamberto | |
| 1140 | earl Goffredo | ||
| 1161 | earl Edigidio | ||
| 1193 | dinasty Walcourt | earl Wery III | |
| 1206 | earl Giacomo I | ||
| 1234 | earl Giacomo II | ||
| 1277 | earl Giacomo III | ||
| 1297 | earl Liberto | ||
| 1324 | earl Umberto | ||
| 1334 | earl Thierry V | ||
| 1374 | Union to Kingdom of France |