Holstein-Plön

Holstein-Plön was the name of a county ruled by the House of Schauenburg that ruled in Holstein and Stormarn from 1110/11. The county emerged before 1295 when the County of Holstein-Itzehoe was divided up after the death of Count Gerhard I of Holstein-Itzehoe (died 1290) into the counties of Holstein-Plön, Holstein-Pinneberg and Holstein-Rendsburg.

The following counts ruled over Holstein-Plön:

After the death of Gerhard II, Gerhard IV and his younger half-brother John III ruled jointly over Holstein-Plön. In 1314 Gerhard IV sold his lands to John III, who thus became the sole Count of Holstein-Plön. He conquered Holstein-Kiel with Gerhard III. When the Plön line died out in 1390, Holstein-Plön and Holstein-Kiel went to Count Nicholas of Holstein-Rendsburg (died 1397) and his nephew, Count Gerhard VI of Holstein-Rendsburg (died 1404).

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