Wilhelm IV, Landgrave of Hesse-Kassel

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Wilhelm IV, Landgrave of Hesse-Kassel Gender: M
born on 24 June 1532 Jul.Cal. (4 July 1532 greg.) at 08:30 (= 08:30 AM )
Place Kassel, Germany, 51n19, 9e29
Timezone LMT m9e29 (is local mean time)
Data source
Rodden Rating B
Collector: Scholfield
Astrology data s_su.18.gif s_cancol.18.gif 11°46' s_mo.18.gif s_piscol.18.gif 25°04 Asc.s_vircol.18.gif 01°29'

Landgrave of Hesse-Kassel Wilhelm IV


German astronomer, also called William the Wise (German: Wilhelm der Weise), who was the first Landgrave of the Landgraviate of Hesse-Kassel (or Hesse-Cassel). He was the founder of the oldest line, which survives to this day.

He was the eldest son of Landgrave Philipp the Magnanimous and Christina of Saxony. After his father's death in 1567, the Landgraviate of Hesse was divided between the four sons out of the late Landgrave of Hesse's first marriage, and Wilhelm received the portion around the capital Kassel, the Landgraviate of Hesse-Kassel.

Wilhelm was a pioneer in astronomical research, and perhaps owes his most lasting fame to his discoveries in this branch of study. The principal product of the astronomical observations was the Hessian star catalogue, a catalogue of about a thousand stars.

Wilhelm was married to Sabine of Württemberg, daughter of Christoph, Duke of Württemberg. They had eleven children.

He died on 25 August 1592, aged 60.

Link to Wikipedia biography


  • associate relationship with Brahe, Tycho (born 14 December 1546 Jul.Cal. (24 Dec 1546 greg.))


  • Death, Cause unspecified 25 August 1592 (greg.) (Age 60)
    chart Placidus Equal_H.

Source Notes

Sy Scholfield quotes from Monimenta Hassiaca by Friederich Christoph Schmincke (Cramer, 1750), p. 336: "Wilhelm Landgraff zu Heßen ist geboren zu Caßel An. D. 1532. den 24 des Brachmonats zwischen acht und neun Uhre."

(Wilhelm Landgraff was born at Kassel in 1532 AD, 24 June, between eight and nine o'clock).


  • Family : Relationship : Marriage more than 15 Yrs
  • Family : Parenting : Kids more than 3 (11+)
  • Vocation : Science : Astronomy
  • Notable : Famous : Royal family (House of Hesse-Kassel)