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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1278 | Duchy - dinasty Pomerania | duke Ottone I | |
| 1344 | duke Barnim III | ||
| 1368 | duke Casimiro III | ||
| 1372 | duke Boleslao VII | ||
| 1404 | duke Swantibor I | ||
| 1413 | duke Ottone II | ||
| 1428 | duke Casimiro V | ||
| 1435 | duke Gioacchino | ||
| 1451 | duke Ottone III | ||
| 1464 | duke Ladislao X duke of Pomerania | ||
| 1478 | duke Boleslao X duke of Pomerania | ||
| 1523 | duke Barnim IX | ||
| 1573 | duke Barnim X | ||
| 1603 | duke Filippo Giulio | ||
| 1625 | Union to Duchy of Pomerania | ||
| 1945 | Union to Polonia |