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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1011 | Bishopland | Bishop Dietrich I | |
| 1022 | bishop Sigfried Walbeck | ||
| 1032 | bishop Hermann I | ||
| 1042 | bishop Rudbert | ||
| 1064 | bishop Friedrich I of Wettin | ||
| 1085 | bishop Erbo | ||
| 1097 | bishop Burchard von Holte | ||
| 1118 | bishop Dietrich II von Zutphen | ||
| 1127 | bishop Eckbert | ||
| 1132 | bishop Werner | ||
| 1152 | bishop Friedrich II von Ahr | ||
| 1169 | bishop Ludwig I von Tecklenberg | ||
| 1174 | bishop Hermann II von Katzenellenbogen | ||
| bishop Otto I von Hildeshausen | |||
| 1218 | bishop Dietrich III von Isenburg | ||
| 1226 | bishop Ludolf von Holte | ||
| 1247 | bishop Otto II von Lippe | ||
| 1259 | bishop Wilhelm I von Holte | ||
| 1261 | bishop Gerhard von Der Marck | ||
| 1272 | vacant | ||
| 1275 | bishop Eberhard von Diest | ||
| 1301 | bishop Otto III von Rietberg | ||
| 1306 | bishop Konrad I von Berg | ||
| 1310 | bishop Ludwig II von Hessen | ||
| 1357 | bishop Adolf von der Marck p.e. of Koln | ||
| 1363 | bishop Johann I von Virneburg bishop of Utrecht | ||
| 1374 | bishop Florent van Wewelinghofen | ||
| 1379 | bishop Johann II Potho von Pothenstein | ||
| 1381 | bishop Heidenreich Wolf von Ludinghausen | ||
| 1392 | bishop Otto IV von Hoya | ||
| 1424 | bishop Heinrich I von Moers | ||
| 1450 | bishop Walram Mors | ||
| 1457 | bishop Johann III von Pfalz-Simmern | ||
| 1466 | bishop Heinrich II von Schwarzburg | ||
| 1497 | bishop Konrad II von Rietberg | ||
| 1508 | bishop Erich I von Saxe-Lauenburg | ||
| 1522 | bishop Friedrich III von Wied | ||
| 1532 | bishop Franz von Waldeck | ||
| 1553 | bishop Wilhelm II von Ketteler | ||
| 1557 | bishop Bernhard von Raesfeld | ||
| 1566 | bishop Johann IV von Hoya | ||
| 1574 | bishop Johann Wilhelm von Jülich-Cleve | ||
| 1585 | bishop Ernest of Wittelsbach p.e. of Koln | ||
| 1612 | bishop Ferdinand I of Wittelsbach p.e. of Koln | ||
| 1650 | bishop Bernhard Christoph von Galen | ||
| 1678 | bishop Ferdinand II von Fürstenberg | ||
| 1683 | bishop Maximilian Heinrich von Bayern p.r. of Koln | ||
| 1688 | bishop Friedrich Christian von Plettenberg-Lenhausen | ||
| 1706 | bishop Franz Arnold Josef Wolf von Metternich zu Cracht | ||
| 1718 | bishop Clemens August of Wittelsbach p.e. of Koln | ||
| 1761 | bishop Maximilian Friedrich von Konigsegg-Rothenfels | ||
| 1784 | bishop Maximilian Franz von Österreich p.e.of Koln | ||
| 1801 | bishop Anton Viktor von Österreich p.e.of Koln | ||
| 1803 | Union to Markgraft of Brandenburg | ||
| 1918 | 9 november | Union to German State of Westfalia |