The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North and Central European Plain.

Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. It borders Latvia to the north, Belarus to the east and south, Poland to the south, and Russia to the southwest, with a maritime border with Sweden to the west. Lithuania covers an area of 65,300 km2 (25,200 sq mi), with a population of 2.86 million. Its capital and largest city is Vilnius; other major cities are Kaunas, Klaipėda, Šiauliai and Panevėžys. Lithuanians belong to the ethnolinguistic group of the Balts and speak Lithuanian, one of only a few living members of the Baltic branch of the Indo-European language family, which is also the most widely spoken language of the branch.