Constantine, Landgrave of Hesse-Rotenburg
Constantine of Hessen-Rotenburg (May 24, 1716 in Rotenburg – December 30, 1778 in Schloss Wildeck) was Landgrave of Hesse-Rotenburg from 1749 until his death.
Constantine was the son of Landgrave Ernest Leopold, Landgrave of Hesse-Rotenburg and his wife Countess Eleonore of Löwenstein-Wertheim.
Constantine married in 1745 with Countess Marie "Sophia" Theresia Hedwigis Eva von Starhemberg, widow of William Hyacinth, Prince of Nassau-Siegen.
When she died in 1773, he remarried in 1775 with French Countess Johanna Henriette de Bombelles (1751-1822).
He had 11 children from his first marriage, including :
Under Constantine,
Hesse-Wanfried was in 1755
returned to Hesse-Rotenburg after the death of Christian of Hesse-Wanfried.
Hesse-Rotenburg, which had been divided in 1648, was now again reunited and remained so until the Treaty of Lunéville in 1801.
He became a knight in the Order of the Golden Fleece in 1759.
William, Landgrave of Hesse-Rotenburg
William I" the Elder" of Hesse- Rotenburg( 15 May 1648, in Kassel – 20 November 1725, in Langenschwalbach) was from 1683 until his death Landgrave of Hesse- Rotenburg.
He was a son of Ernest I of Hesse- Rotenburg- Rheinfels and his wife, Countess Maria Eleonore of Solms- Lich.
William was nicknamed" the Elder" to distinguish him from his nephew, William of Hesse- Wanfried.
Herman IV, Landgrave of Hesse-Rotenburg
Landgrave Hermann IV of Hesse- Rotenburg( 15 August 1607 in Kassel – 25 March 1658 in Rotenburg an der Fulda), was the first Landgrave of the semi -independent Landgraviate of Hesse- Rotenburg.
He was the fourth son of the Landgrave Maurice of Hesse- Kassel and his second wife Juliane of Nassau- Dillenburg.
Charles Emmanuel, Landgrave of Hesse-Rotenburg
Charles Emmanuel, Landgrave of Hesse- Rotenburg( Karl Emanuel; 5 June 1746 – 23 March 1812) was landgrave of Hessen- Rotenburg between 1778 and 1812.
He was named after his uncle Charles Emmanuel III of Sardinia, husband of his aunt Polyxena of Hesse- Rotenburg.
Joseph, Hereditary Prince of Hesse-Rotenburg
Joseph of Hesse- Rotenburg( 23 September 1705 – 24 June 1744) was the Hereditary Prince of Hesse- Rotenburg from his birth till his death in 1744.
He was heir apparent to the Landgraviate of Hesse- Rotenburg.
Victor Amadeus, Landgrave of Hesse-Rotenburg
Victor of Hesse-Rotenburg (Victor Amadeus; 2 September 1779 – 12 November 1834) was the last Landgrave of Hesse-Rotenburg and the Prince of Corvey from 1815 and Duke of Ratibor from 1821.
His namesake was his second cousin King Victor Amadeus III of Sardinia.
Eleonore of Löwenstein-Wertheim
Eleonore of Löwenstein-Wertheim (Eleonore Maria Anna; 16 February 1686 – 22 February 1753) was a Princess of the Löwenstein-Wertheim-Rochefort.
She was the Landgravine of Hesse-Rotenburg by marriage.
Baptised as Eleonore Maria Anna, she was known as "Eleonore' meaning 'true and perpetual beauty'.'.
Ernest Leopold, Landgrave of Hesse-Rotenburg
Ernst Leopold of Hesse- Rotenburg( 15 June 1684 – 29 November 1749) was landgrave of Hessen- Rheinfels- Rotenburg between 1725 and 1749.
Born in Langenschwalbach, he was a son of landgrave William of Hesse- Rotenburg and Maria Anna of Löwenstein- Wertheim( 1652 – 1688).
He died in Rotenburg in 1749.
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.
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.

Question: When did Constantine, Landgrave Of Hesse-Rotenburg's mother die?