Holstein-Plön
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Holstein-Plön was a county () in the
Holy Roman Empire The Holy Roman Empire, also known as the Holy Roman Empire of the German Nation after 1512, was a polity in Central and Western Europe, usually headed by the Holy Roman Emperor. It developed in the Early Middle Ages, and lasted for a millennium ...
centred on Plön in
Holstein Holstein (; ; ; ; ) is the region between the rivers Elbe and Eider (river), Eider. It is the southern half of Schleswig-Holstein, the northernmost States of Germany, state of Germany. Holstein once existed as the German County of Holstein (; 8 ...
. It was held by the
House of Schauenburg The House of Schaumburg was a dynasty of German rulers. Until , it was also known as the House of Schauenburg. Together with its ancestral possession, the County of Schaumburg, the family also ruled the County of Holstein and its partitions Hols ...
who had ruled in Holstein and Stormarn since 1110/11. The county emerged before 1295 when the County of Holstein-Itzehoe was partitioned 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: * 1295–1312 Gerhard II ''the Blind'' (born 1253; died 1312), married Agnes of Brandenburg (born after 1255; died 1304), daughter of John I of Brandenburg, in 1293 * 1312–1314 Gerhard IV (died before 1320), dean (''Dompropst'') of Lübeck Cathedral, 1300–1311 * 1312–1359 John III ''the Mild'' (born ; died 1359) * 1323–1350 (born ; died 1350) was never a ruler, but only a landowner and canon at Lübeck Cathedral * 1321–1359 John III ''the Mild'', also Count of Holstein-Kiel and Lord of Fehmarn * 1359–1390 Adolphus VII (died 1390), also Count of Holstein-Kiel and Lord of Fehmarn Following the death of Gerhard II his sons, Gerhard IV of Holstein-Plön 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. John III conquered
Holstein-Kiel The imperial county of Holstein-Kiel was a line of the counts of Schauenburg and Holstein, House of Schauenburg and Holstein from 1261 to 1390. History The County of Holstein was ruled until 1238 by Adolphus IV of Schauenburg and Holstein. When ...
with Gerhard III of Holstein-Rendsburg. Holstein-Plön reverted to Holstein-Kiel in 1350 upon the death of 27-year-old Gerhard V without issue. When the Plön line died out in 1390, Holstein-Kiel (and Holstein-Plön within it) reverted to Holstein-Rendsburg, ruled by Count Nicholas of Holstein-Rendsburg (died 1397) and his nephew, Count Gerhard VI of Holstein-Rendsburg (died 1404). A circa-1400 map of the region shows the borders of Holstein-Rendsburg and its subordinate counties, Holstein-Kiel and Holstein-Plön.


Rise and fall of the county

{{DEFAULTSORT:HolsteinPlon Plon Counties of the Holy Roman Empire Holstein Former monarchies of Europe