| YEAR | DATE | EVENT | HEAD OF STATE |
| 1161 | Bishopland | ||
| 1238 | bishop Federico of Schwerin | ||
| 1239 | x | ||
| 1364 | bishop Rodolfo dinasty Ascani | ||
| 1365 | x | ||
| 1376 | bishop Melchiorking of Brunswick bishop of Osnabruck | ||
| 1648 | Principality of Duchy of Mecklenburg | ||
| 1918 | Union to Duchy of Mecklenburgo |