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Schleswig-Holstein-Sonderburg-Plön
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This article is about the duchy of the early modern era. For medieval county, see Holstein-Plön.
The Duchy of Schleswig-Holstein-Sonderburg-Plön (German: Herzogtum Schleswig-Holstein-Sonderburg-Plön), also Schleswig-Holstein-Plön, Holstein-Plön or just Duchy of Plön, was a small sub-duchy (Teilherzogtum) created by the physical division of the Duchy of Schleswig-Holstein-Sonderburg. Today, its remaining significance is primarily the building of Plön Castle. The Duchy of Plön was not a territorial dukedom in its own right, but a sub-division within the state structure of the duchies of Schleswig and Holstein. The scattered territorial dominion lay mostly in the southeast part of present-day German state of Schleswig-Holstein.
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