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William IV of Hesse
Landgrave of Hesse-Kassel
Years: 1532 - 1592
William IV of Hesse-Kassel (24 June 1532 – 25 August 1592), also called William the Wise, is the first Landgrave of Hesse-Kassel (or Hesse-Cassel).
He is the founder of the oldest line, which survives to this day.
