Duchy of Pomerania | |
|---|---|
| 1121–1160 1264–1295 1478–1531 1625–1637 | |
 Map of the Duchy of Pomerania from the 17th century | |
| Status | Vassal of Poland (1121–1138) Independent (1138–1160) Vassal of Saxony (1164–1181) Vassal of the Holy Roman Empire (1181–1185) Vassal of Denmark (1185–1227) Vassal of the Holy Roman Empire (1227–1637) |
| Capital | Stettin (Szczecin) |
| Religion | Roman Catholic Lutheran |
| Government | Feudal duchy |
| Historical era | High Middle Ages |
| 1121 | |
• Partition into Wolgast and Stettin | 1295 |
• Reunited under Bogislaw X | 1478 |
• Joined Upper Saxon Circle | 1512 |
• Divided again into P.-Wolgast and P.-Stettin | 1532 |
• Occupied by Gustavus Adolphus of Sweden | 1630 |
• Death of Duke Bogislaw XIV | 10 March 1637 |
| Today part of | Poland Germany |
.svg)
The Duchy of Pomerania (German: Herzogtum Pommern; Polish: Księstwo pomorskie; Latin: Ducatus Pomeraniae) was a duchy in Pomerania on the southern coast of the Baltic Sea, ruled by dukes of the House of Pomerania (Griffins). The country existed in the Middle Ages between years 1121–1160, 1264–1295, 1478–1531, and 1625–1637.
The duchy originated from the realm of Wartislaw I, a Slavic Pomeranian duke, and was extended by the Lands of Schlawe and Stolp in 1317, the Principality of Rügen in 1325, and the Lauenburg and Bütow Land in 1455. During the High Middle Ages, it also comprised the northern Neumark and Uckermark areas as well as Circipania and Mecklenburg-Strelitz.
The Duchy of Pomerania was established as a vassal state of Poland in 1121, which it remained until the fragmentation of Poland after the death of Polish ruler Bolesław III Wrymouth in 1138. Afterwards the Dukes of Pomerania were independent, and later were vassals of the Duchy of Saxony from 1164 to 1181, of the Holy Roman Empire from 1181 to 1185, of Denmark from 1185 to 1227 and finally, from 1227 on, staying with the Holy Roman Empire (including periods of vassalage to the Margraves of Brandenburg).
Most of the time, the duchy was ruled by several Griffin dukes in common, resulting in various internal partitions. After the last Griffin duke had died during the Thirty Years' War in 1637, the duchy was partitioned between Brandenburg-Prussia and Sweden. The Kings of Sweden and the Margraves of Brandenburg, later Kings of Prussia, became members as Dukes of Pomerania in the List of Reichstag participants.