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| YEAR | DATE | EVENT | HEAD OF STATE |
| 1103 | Duchy - dinasty Pomerania | duke Ladislao I | |
| 1153 | duke Ratibor I | ||
| 1155 | duke Casimiro I | ||
| 1180 | duke Boleslao I | ||
| 1187 | duke Casimiro II | ||
| 1219 | duke Boleslao II | ||
| 1220 | duke Ladislao III | ||
| 1264 | duke Barnim I | ||
| 1278 | duke Barnim II | ||
| 1295 | duke Boleslao IV | ||
| 1309 | duke Ladislao IV | ||
| 1326 | duke Boleslao V | ||
| 1373 | duke Casimiro IV | ||
| 1377 | duke Ladislao VII | ||
| 1395 | duke Barnim V | ||
| 1405 | duke Erik I Re of Danmark | ||
| 1459 | duke Erik II | ||
| 1474 | duke Ladialao X | ||
| 1478 | duke Boleslao X | ||
| 1523 | duke Giorgio I | ||
| 1531 | duke Filippo I | ||
| 1560 | duke Ernesto Ludovico | ||
| 1592 | duke John Federico | ||
| 1600 | duke Boleslao XIII | ||
| 1606 | duke Filippo II | ||
| 1618 | duke Francesco | ||
| 1620 | duke Boleslao XIV | ||
| 1637 | Duchy of King of Svezia - Western Pomerania | ||
| 1720 | Duchy of Zar of Russia | ||
| 1810 | Duchy of King of Svezia | ||
| 1814 | Duchy of King of Danmark | ||
| 1815 | Union to Markgraft of Brandenburg | ||
| 1945 | Part of Eastern Germany | ||
| 1990 | Union to German State of Mecklenburgo |