Charles II, Landgrave of Hesse-Philippsthal
Charles II of Hesse- Philippsthal( 22 May 1803 in Philippsthal – 12 February 1868 in Philippsthal) was a member of the House of Hesse and was Landgrave of Hesse- Philippsthal from 1849 until 1866.
Ernest Constantine, Landgrave of Hesse-Philippsthal
Ernest Constantine, Landgrave of Hesse-Philippsthal (8 August 1771 in Philippsthal – 25 December 1849 in Meiningen) was a member of the House of Hesse and Landgrave of Hesse-Philippsthal from 1816 until his death.
Philip II, Count of Schaumburg-Lippe
Philipp II Ernst, Count of Schaumburg-Lippe (5 July 1720– 13 February 1787)
was a ruler of the counties of Lippe-Alverdissen and Schaumburg-Lippe.
Landgravine Juliane of Hesse-Philippsthal
Juliane of Hesse-Philippsthal (8 June 1761 – 9 November 1799), was a countess of Schaumburg-Lippe, married in 1780 to Count Philip II, Count of Schaumburg-Lippe.
She served as the regent of Schaumburg-Lippe during the minority of her son from 1787 to 1799.
William, Landgrave of Hesse-Philippsthal
William of Hesse- Philippsthal( born 29 August 1726 in Philippsthal; died: 8 August 1810, Philippsthal) was a member of the House of Hesse and Landgrave of Hesse- Philippsthal from 1770 until his death.
Charles I, Landgrave of Hesse-Philippsthal
Charles I, Landgrave of Hesse- Philippsthal( 23 September 1682 – 8 May 1770) was a member of the House of Hesse and Landgrave of Hesse- Philippsthal from 1721 until his death.
William, Landgrave of Hesse-Philippsthal-Barchfeld
William of Hesse-Philippsthal-Barchfeld (1 April 1692 – 13 May 1761) was a member of the House of Hesse and was Landgrave of Hesse-Philippsthal-Barchfeld from 1721 to 1761.
Wilhelm, Landgrave of Hesse-Philippsthal-Barchfeld
Wilhelm, Prince and Landgrave of Hesse- Philippsthal- Barchfeld( born 14 August 1933) is the Landgrave"( His Highness)" and current head of one of the two remaining branches of the House of Hesse, that of Hesse- Philippsthal- Barchfeld, a noble title dating to the late Holy Roman Empire.
Philip, Landgrave of Hesse-Philippsthal
Philip of Hesse- Philippsthal( 14 December 1655 – 18 June 1721) was the son of William VI, Landgrave of Hesse- Kassel and Hedwig Sophia of Brandenburg.
He was the first landgrave of Hesse- Philippsthal from 1663 to 1721 and the founder of the fifth branch of the house of Hesse.
Ernest, Landgrave of Hesse-Philippsthal
Ernest Eugene Charles Augustus Bernard Paul of Hesse- Philippsthal( born: 20 December 1846 in Philippsthal; died: 22 December 1925 in Eisenach) was a member of the House of Hesse and was the last ruling Landgrave of Hesse- Philippsthal.

Question: When did Landgravine Juliane Of Hesse-Philippsthal's husband die?
Answer: 13 February 1787