| YEAR | DATE | EVENT | EARL |
| 1200 | Count - dinasty Dortmund | Corrado I | |
| 1225 | Corrado II | ||
| 1253 | Herbord | ||
| 1298 | Corrado III | ||
| 1316 | Corrado IV | ||
| 1341 | Corrado V | ||
| 1399 | Enrico I | ||
| 1429 | Corrado VI | ||
| 1449 | Enrico II | ||
| 1452 | earles Caterina | ||
| 1534 | Union to H.R.E. | ||
| 1918 | 9 november | Union to German State of Westfalia |