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Frederick II, Landgrave of Hesse-Kassel

Frederick II, Landgrave of Hesse-Kassel Landgrave of Hesse-Kassel (or Hesse-Cassel) from 1760 to 1785

Landgrave of Hesse-Kassel (or Hesse-Cassel) from 1760 to 1785
Frederick II, Landgrave of Hesse-Kassel
The basics

Quick Facts

Intro Landgrave of Hesse-Kassel (or Hesse-Cassel) from 1760 to 1785
A.K.A. Frederick II
Was Noble
Type Royals
Gender male
Birth 14 August 1720, Kassel
Death 31 October 1785, Kassel (aged 65 years)
Star sign LeoLeo
Mother: Dorothea Wilhelmine of Saxe-Zeitz
Father: William VIIILandgrave of Hesse-Kassel
Spouse: Princess Mary of Great BritainMargravine Philippine of Brandenburg-Schwedt
Children: William IElector of HessePrince Charles of Hesse-KasselPrince Frederick of Hesse-Kassel
The details


Frederick II (German: Landgraf Friedrich II von Hessen-Kassel) (14 August 1720 – 31 October 1785) was Landgrave of Hesse-Kassel (or Hesse-Cassel) from 1760 to 1785. He ruled as an enlightened despot, and raised money by renting soldiers (called "Hessians") to Great Britain to help fight the American Revolutionary War. He combined Enlightenment ideas with Christian values, cameralist plans for central control of the economy, and a militaristic approach toward international diplomacy.

Early life

Frederick was born at Kassel in Hesse, the son of William VIII, Landgrave of Hesse-Kassel and his wife Dorothea Wilhelmine of Saxe-Zeitz. His paternal grandfather was Charles I, Landgrave of Hesse-Kassel, and his paternal uncle was Frederick I of Sweden. His education was initially entrusted to Colonel August Moritz von Donop and then from 1726 to 1733 to the Swiss theologian and philosopher, Jean-Pierre de Crousaz.

Marriages and children

On 8 May 1740, by proxy in London, and on 28 June 1740 in person in Kassel, Frederick married Princess Mary, daughter of King George II of Great Britain and Caroline of Ansbach. They had four sons:

  1. William (25 December 1741 – 1 July 1742)
  2. William I, Elector of Hesse (3 June 1743 – 27 February 1821)
  3. Charles (19 December 1744 – 17 August 1836)
  4. Frederick (11 September 1747 – 20 May 1837), father of Prince William of Hesse-Kassel and grandfather of Queen Louise of Denmark.

In December 1745, Frederick landed in Scotland with 6000 Hessian troops to support his father-in-law, George II of Great Britain, in dealing with the Jacobite rising. Although he supported the "Protestant succession" in Great Britain on this occasion, Frederick later converted from Calvinism to Catholicism. In February 1749, Frederick and his father visited the Archbishop-Elector of Cologne, Clemens August of Bavaria, who received Frederick into the Catholic Church.

Despite his exertions in support of her father, Frederick's marriage with the British princess was not a happy one. The couple were living apart from each other by 1747, and were formally separated in 1755. Mary moved to Denmark the following year, to care for the children of her late sister Louise of Great Britain, who had died in 1751. All three of the couple's surviving sons moved with Mary to Denmark. Two of them, including Frederick's heir William, later married Danish princesses, their first cousins. The younger sons lived permanently in Denmark, rising to high office in the court of their cousin; only William returned to Germany upon inheriting the principality of Hanau. He also later succeeded Frederick as Landgrave of Hesse-Kassel.

Mary died in 1772, and Frederick lost little time in marrying again. On 10 January 1773, at Berlin, he married Margravine Philippine, daughter of Frederick William, Margrave of Brandenburg-Schwedt and Sophia Dorothea of Prussia. No children were born of this marriage.


After being formally separated from his wife in 1755, Friedrich entered active service in the Prussian military. In 1760, he succeeded his father as Landgrave of Hesse-Kassel. Despite Frederick's Catholicism, the principality remained Calvinist, and Frederick's children were raised as Protestants in Denmark.

During the 17th and 18th centuries, it was a fairly widespread practice for smaller principalities to rent out troops to other princes. However, the practise was carried to excess in Hesse-Kassel, which maintained 7% of its entire population under arms throughout the eighteenth century. Frederick hired out so many troops to his nephew, King George III of Great Britain, for use in the American War of Independence, that "Hessian" has become an American term for all German soldiers deployed by the British in the War. Frederick used the revenue to finance his patronage of the arts and his opulent lifestyle. The architect Simon Louis du Ry transformed for Frederick II. the town of Kassel into a modern capital.

Landgrave Frederick II died in 1785 at Castle Weißenstein, Kassel. He was succeeded by his eldest surviving son, William.


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