Eastern Pomerania was the Duchy of Pomerelia, which spit into others including Kashubian-speaking areas west of Gdańsk.
Pomerelia or Gdańsk Pomerania had been independent of the Polish dukes from 1227.
Their former capital of Marienburg was not the only loss, however, as the Order had to cede other areas in the Second Peace of Thorn in 1466: Pomerelia, Culmerland, Warmia, and a part of Pomesania including Marienwerder (Kwidzyn).
They are situated adjacent to one other, in a row, on the coast of the Gdańsk Bay, Baltic Sea, in Pomerelia (Pomeranian Voivodeship), northern Poland.
Immediately after being elected, von Orseln was forced to start negotiations with King Władysław I the Elbow-high of Poland over the contested lands of Pomerelia, which the Knights had annexed after the takeover of Gdańsk in 1308.
In the Treaty of Soldin of 13 September 1309, the Margraves of Brandenburg sold the part of Pomerelia east of the Łeba River to the Teutonic Order.
East Pomeranian, the East Low German dialect of Farther Pomerania and western Pomerelia, Low Prussian, the East Low German dialect of eastern Pomerelia, and Standard German were dominating in Pomerania east of the Oder-Neisse line before most of its speakers were expelled after World War II.
Schwerin was graduated at Breslau in 1926 and administered his family's manors in Göhren (today part of Woldegk, Mecklenburg) and Sartowice near Świecie, Pomerelia in Poland.