Prussia (region)
Historical region on the south-eastern coast of the Baltic Sea in Europe
Prussia is a historical region in Central Europe on the south-eastern coast of the Baltic Sea that ranges from the Vistula delta in the west to the end of the Curonian Spit in the east and extends inland as far as Masuria, divided between Poland (Warmian–Masurian Voivodeship), Russia (Kaliningrad Oblast) and Lithuania (Lithuania Minor). This region is often also referred to as Old Prussia. Tacitus's Germania (98 AD) is the oldest known record of an eyewitness account on the territory and its inhabitants.
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