Duchy of Eastern Pomerania

Duchy of Eastern Pomerania Księstwo wschodniopomorskie (Polish) Ducatus Pomeraniae Orientalis (Latin)
11th century – 1046/1048 c. 1060 – 1227 1270–1308
Coat of arms
Kingdom of Poland between 1304 and 1333, including Duchy of Pomerelia.
Status	Independent state (11th century – 1046/1048, c. 1060 – 1119, 1270–1294) Fiefdom of Kingdom of Poland (1119–1210, 1211–1223, 1294–1308) Fiefdom of Denmark (1210–1211)
Capital	Gdańsk
Official languages	Polish, Latin
Religion	Roman Catholic
Government	Duchy
Duke
• 11th century (first)	Siemomysł
• 1306–1308 (last)	Władysław I Łokietek
Historical era	High Middle Ages
• Partition of the Kingdom of Poland	11th century
• Incorporation into the Duchy of Poland	1046/1048
• Partition from the Duchy of Poland	c. 1060
• Becoming a fiefdom of the Duchy of Poland	1119
• Becoming a fiefdom of the Denmark	1210
• Becoming a fiefdom of the Duchy of Poland	1211
• Independence and partition into Duchy of Gdańsk and the Duchy of Świecie and Lubiszewo	1227
• Unification of the duchies of Gdańsk and Świecie	1270
• Becoming a fiefdom of the Duchy of Greater Poland	1294
• Conquest by the State of the Teutonic Order	1308
Preceded by Succeeded by Kingdom of Poland Duchy of Poland Duchy of Gdańsk Duchy of Świecie Duchy of Poland Duchy of Gdańsk Duchy of Świecie and Lubiszewo Margraviate of Brandenburg State of the Teutonic Order

The Duchy of Eastern Pomerania,^[a] was a duchy centred on Pomerelia, with Gdańsk as its capital.

The duchy was formed after gaining independence from the Kingdom of Poland in the 11th century, following the death of Bolesław I the Brave in 1025. The duchy was then integrated back into Poland in 1046 or 1048 by Casimir I the Restorer, and its land remained under Polish rule until around 1060, when the duchy was restored.^[1] In 1119, the duchy was again conquered by Poland and became its fiefdom, being ruled by stewards under the rule of the King of Poland. In 1210, it briefly became a fiefdom of Denmark under the rule of Valdemar II, until it was reconquered the next year by the king of Poland, Leszek the White. In 1227, the duchy gained independence from Poland, whereupon it was divided into the Duchy of Gdańsk and the Duchy of Świecie and Lubiszewo. Pomerelia united again in 1270 from the duchies of Gdańsk and Świecie, remaining independent until 1294, when Przemysł II, king of Poland, became its duke, making it again dependent on Poland. In 1308, the city of Gdańsk was occupied by the Margraviate of Brandenburg. After this event, the whole duchy was conquered by the State of the Teutonic Order.

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