William VIII ruled the German Landgraviate Hesse-Kassel from 1730 until his death, first as regent and then as landgrave.
Portrait of William VIII with the Order of the White Eagle (1729)
Schloss Wilhelmsthal
Frederick I of Sweden
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Frederick I was King of Sweden from 1720 until his death, having been prince consort of Sweden from 1718 to 1720, and was also Landgrave of Hesse-Kassel from 1730. He ascended the throne following the
Frederick's parents, Landgrave Charles and Landgravine Maria Amalia of Hesse-Kassel
Frederick I in armour
King Frederick's extramarital sons Frederick William and Charles Edward von Hessenstein