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The Duchy of Mecklenburg-Strelitz was a duchy in northern Germany consisting of the eastern fifth of the historic Mecklenburg region, roughly corresponding with the present-day Mecklenburg-Strelitz district (the former Lordship of Stargard), and the western exclave of the former Bishopric of Ratzeburg in modern Schleswig-Holstein. At the time of its establishment, the duchy bordered on the territory of Swedish Pomerania in the north and of Brandenburg in the south.