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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: * 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 ca. 1296; died 1359) * 1323 – 1350 Gerhard V (born ca. 1315; 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 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). == Rise and fall of the county == 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Holstein-Plön」の詳細全文を読む スポンサード リンク
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