| YEAR | DATE | EVENT | HEAD OF STATE |
| 959 | Duchy | Duchy Godfrey I | |
| 964 | duke Godfrey II | ||
| 976 | dinasty Carolingi | duke Charles | |
| 991 | duke Otto | ||
| 1005 | dinasty Wigerich | duke Godfrey III | |
| 1023 | duke Gozelo I | ||
| 1044 | duke Gozelo II | ||
| 1046 | duke Frederick | ||
| 1065 | duke Godfrey IV | ||
| 1069 | 21 december | duke Godfrey V | |
| 1076 | 26 february | duke Conrad II King of Germany | |
| 1088 | dinasty Bouillon | duke Godfrey VI King of Jerusalem | |
| 1100 | 18 july | nobody | |
| 1101 | 25 december | dinasty Limburgo | duke Henry I |
| 1106 | 13 may | Union to Count of Lovanio |