Curonian Lagoon

The Curonian Lagoon is separated from the Baltic Sea by the Curonian Spit. Its surface area is 1,619 square kilometers . The Neman River supplies about 90% of its inflows; its watershed consists of about 100,450 square kilometres in Lithuania and Russia's Kaliningrad Oblast.
In the 13th century, the area around the lagoon was part of the ancestral lands of the Curonians and Old Prussians. Later it bordered the historical region of Lithuania Minor. At the northern end of the Spit, there is a passage to the Baltic Sea, and the place was chosen by the Teutonic Knights in 1252 to found Memelburg castle and the city of Memel — officially called Klaipėda in 1923-39, when the Memel Territory was separated from Germany, and again after 1945, when it became part of the Lithuanian SSR.

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