| YEAR | DATE | EVENT | HEAD OF STATE |
| 1092 | Count - dinasty Kleve | earl Arnoldo I | |
| 1150 | earl Dietrich IV | ||
| 1172 | earl Dietrich V | ||
| 1193 | earl Arnoldo III | ||
| 1200 | earl Dietrich VI | ||
| 1260 | earl Dietrich VII | ||
| 1275 | earl Dietrich VIII | ||
| 1305 | earl Otto | ||
| 1310 | earl Dietrich IX | ||
| 1346 | earl John | ||
| 1368 | dinasty Ezzoni | earl Adolfo I | |
| 1394 | earl Adolfo II | ||
| 1417 | Duchy | duke Adolfo II | |
| 1448 | duke John I | ||
| 1481 | earl John II | ||
| 1521 | duke John III | ||
| 1539 | duke Guglielmo | ||
| 1592 | duke John Guglielmo | ||
| 1609 | x | ||
| 1614 | Duchy of Markgraft of Brandenburg | ||
| 1805 | Annession to France | ||
| 1813 | Union to Markgraft of Brandenburg | ||
| 1918 | 9 november | Union to German State of Westfalia |