Holstein-Glückstadt or Schleswig-Holstein-Glückstadt is the historiographical name, as well as contemporary shorthand name, for the parts of the duchies of Schleswig and Holstein that were ruled by the Kings of Denmark in their function as dukes of Schleswig and Holstein, thus also known as Royal Schleswig-Holstein. Other parts of the duchies were ruled by the Dukes of Schleswig-Holstein-Gottorp. The territories of Holstein-Glückstadt are located in present-day Denmark and Germany. The main centre of administration was Segeberg and from 1648 Glückstadt (founded in 1617) on the River Elbe.
Holstein-Glückstadt or Schleswig-Holstein-Glückstadt is the historiographical name, as well as contemporary shorthand name, for the parts of the duchies of Schleswig and Holstein that were ruled by the Kings of Denmark in their function as dukes of Schleswig and Holstein, thus also known as Royal Schleswig-Holstein. Other parts of the duchies were ruled by the Dukes of Schleswig-Holstein-Gottorp. The territories of Holstein-Glückstadt are located in present-day Denmark and Germany. The main centre of administration was Segeberg and from 1648 Glückstadt (founded in 1617) on the River Elbe.
==History== After the death of Frederick I of Denmark - who was also Duke of Schleswig and Holstein - his three sons partitioned the Duchies between them in 1544 whereby each of the three brothers received a part of both duchies: The Duchy of Schleswig-Holstein in Segeberg, held by King Christian III of Denmark and his successors, identical with the Kings of Denmark. From 1648 the royal parts of Schleswig and Holstein were administered out of Glückstadt, known as the Duchy of Schleswig-Holstein-Glückstadt. Before 1773 its Holstein territory consisted of the following Ämter: Rendsburg, Southern Dithmarschen, Steinburg, Segeberg, and Plön. The Duchy of Schleswig-Holstein in Haderslev, held by Duke Hans the Elder. Hans had no issue and after his death in 1580, his territories were divided among his brothers. The Duchy of Schleswig-Holstein in Gottorp, held by Duke Adolf and his successors.
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