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