| YEAR | DATE | EVENT | HEAD OF STATE |
| 1023 | Bishopland | Bishop Brantho | |
| 1036 | bishop Burkhard I of Babenberg | ||
| 1059 | bishop | ||
| 1059 | bishop Burkhard II von Veltheim | ||
| 1089 | bishop Dietmar von Supplinburg | ||
| 1089 | bishop Friedrich I | ||
| 1106 | bishop Reinhard von Blankenburg | ||
| 1123 | bishop Otto von Kuditz | ||
| 1136 | bishop Rudolf I | ||
| 1149 | bishop Ulrich | ||
| 1180 | bishop Dietrich von Krosigk | ||
| 1193 | bishop Berthold von Hardke | ||
| 1201 | bishop Konrad von Krosigk | ||
| 1209 | bishop Friedrich II von Kirchberg | ||
| 1236 | bishop Ludolf I von Schladen | ||
| 1241 | bishop Meinhard von Kranichfeld | ||
| 1253 | bishop Ludolf II von Schladen | ||
| 1255 | bishop Volrad von Kranichfeld | ||
| 1296 | bishop Hermann von Blankenburg | ||
| 1303 | bishop Albrecht I of Anhalt | ||
| 1324 | bishop Albrecht II of Brunswick-Lüneburg | ||
| 1357 | bishop Ludwig of Meissen | ||
| 1366 | bishop Albrecht III von Berg | ||
| 1390 | bishop Ernst I von Hohnstein | ||
| 1399 | bishop Rudolf II of Anhalt | ||
| 1406 | bishop Heinrich von Warburg | ||
| 1411 | bishop Albrecht IV von Wernigerode | ||
| 1419 | bishop Johann von Hoym | ||
| 1436 | bishop Burkhard III von Warburg | ||
| 1458 | bishop Gebhard von Hoym | ||
| 1480 | bishop Ernst II of Saxony | ||
| 1513 | bishop Albrecht V of Brandenburg | ||
| 1545 | bishop Johann Albrecht of Brandenburg | ||
| 1550 | bishop Friedrich III of Brandenburg arcibishop of Magdeburgo | ||
| 1552 | bishop Sigismund II of Brandenburg arcibishop of Magdeburgo | ||
| 1566 | bishop Heinrich Julius of Brunswick-Lüneburg | ||
| 1613 | bishop Heinrich Karl of Brunswick-Lüneburg | ||
| 1615 | bishop Rudolf III of Brunswick-Lüneburg | ||
| 1616 | bishop Christian of Brunswick-Lüneburg | ||
| 1624 | bishop Christian Wilhelm of Brandenburg | ||
| 1627 | bishop Leopold Wilhelm of Austria | ||
| 1648 | Principality of Markgraft of Brandenburg | ||
| 1803 | Union to Markgraft of Brandenburg |