Sambia (Russian: Самбийский полуостров, Sambiysky poluostrov, literally the Sambiysky Peninsula) or Samland (Russian: Земландский полуостров, Zemlandsky poluostrov, literally the Zemlandsky Peninsula) or Kaliningrad Peninsula (official name, Russian: Калининградский полуостров, Kaliningradsky poluostrov) is a peninsula in the Kaliningrad Oblast of Russia, on the southeastern shore of the Baltic Sea. The peninsula is bounded by the Curonian Lagoon (to the north-east), the Vistula Lagoon (on the southwest), the Pregel River (on the south), and the Deyma River (on the east). As Samland is surrounded on all sides by water, it is technically an island. Prior to 1945 it formed an important part of East Prussia.