Prince Raphael Rainer of Thurn and Taxis
"Raphael Rainer" Karl Maria Joseph Antonius Ignatius Hubertus Lamoral Prince of Thurn and Taxis (30 May 1906 at Regensburg, Germany - 8 June 1993 at Schwangau, Germany) was the sixth son of Albert, 8th Prince of Thurn and Taxis and his wife Archduchess Margarethe Klementine of Austria.
He is the father of Prince Max Emanuel of Thurn and Taxis, the heir presumptive to Albert, 12th Prince of Thurn and Taxis.
Eugen Alexander Franz, 1st Prince of Thurn and Taxis
Eugen Alexander Franz, 1st Prince of Thurn and Taxis, full German name: "Eugen Alexander Franz Fürst von Thurn und Taxis" (baptized 11 January 1652 – 21 February 1714) was the first Prince of Thurn and Taxis, Postmaster General of the Imperial Reichspost, and Head of the House of Thurn and Taxis from 13 September 1676 until his death.
Anselm Franz, 2nd Prince of Thurn and Taxis
Anselm Franz, 2nd Prince of Thurn and Taxis, full German name:" Anselm Franz Fürst von Thurn und Taxis"( 30 January
1681 – 8 November 1739) was the second Prince of Thurn and Taxis, Postmaster General of the Imperial Reichspost, and Head of the House of Thurn and Taxis from 21 February 1714 until his death on 8 November 1739.
Princess Eulalia of Thurn and Taxis
Princess Eulalia Maria Antoine Eleonore of Thurn and Taxis, also known as Illa, (21 December 1908 - 30 December 1993) was the eldest child of Prince Friedrich Lamoral of Thurn and Taxis and his wife, Princess Eleonore de Ligne.
She belonged to the Czech branch of the House of Thurn and Taxis.
Friedrich Christian, Margrave of Meissen
Albert Leopold Friedrich Christian Sylvester Anno Macarius, Prince of Saxony, Duke of Saxony, Margrave of Meissen (31 December 1893 – 9 August 1968) was the second son of Frederick Augustus III, the last reigning king of Saxony before the abolition of the monarchy in 1918.
Upon his father's death in 1932, he became the head of the Royal House of Saxony.
He was Captain à la suite in the Royal Bulgarian Infantry, and Grand Master of the Order of the Rue Crown, and also a Knight in the Order of the Black Eagle and Knight Grand Cross in the Sovereign Military Order of Malta.
As head of the House of Wettin after 1932, he styled himself as "Friedrich Christian, Margrave of Meissen".
According to the Portuguese primogeniture law, he also should have succeeded to Portugal in 1932.
Prince Gabriel of Thurn and Taxis
Prince Gabriel Albert Maria Michael Franz Joseph Gallus Lamoral of Thurn and Taxis( 16 October 1922 – 17 December 1942) was a member of the Princely House of Thurn and Taxis and a Prince of Thurn and Taxis.
Gabriel was second in the line of succession to the Headship of the House of Thurn and Taxis after his father Franz Joseph, Hereditary Prince of Thurn and Taxis until his death in the Battle of Stalingrad, at which point he was replaced by his uncle Prince Karl August of Thurn and Taxis.
Prince Victor of Thurn and Taxis
Prince" Victor" of Thurn and Taxis( 18 January 1876, Ecska – 28 January 1928, Vienna, Austria) was a member of the Princely House of Thurn and Taxis and a Prince of Thurn and Taxis.
Prince Max Emanuel of Thurn and Taxis
Father" Emmeram" of Thurn and Taxis OSB, until his profession Prince" Max Emanuel"
Maria Siegfried Joseph Antonius Ignatius Lamoral of Thurn and Taxis( 1 March 1902, Regensburg, Kingdom of Bavaria – 3 October 1994, Regensburg, Bavaria, Germany) was a German Benedictine and member of the Princely House of Thurn and Taxis.
Prince Nikolaus of Thurn and Taxis (1885–1919)
Prince Nikolaus of Thurn and Taxis( later Nikolaus, Baron of Hochstadt)( 21 January 1885 – 8 June 1919) was a member of the Princely House of Thurn and Taxis and a Prince of Thurn and Taxis.
Nikolaus was a Lieutenant in the German Imperial Navy.
Princess Elisabeth Helene of Thurn and Taxis
Princess Elisabeth Helene of Thurn and Taxis  (15 December 1903, Regensburg, Kingdom of Bavaria – 22 October 1976, Munich, Bavaria, Germany) was a Princess of Thurn and Taxis by birth and a Princess and Duchess of Saxony, Margravine of Meissen, and titular Queen consort of Saxony through her marriage to Friedrich Christian, Margrave of Meissen.
Elisabeth was the sixth child of Albert, 8th Prince of Thurn and Taxis and his wife Archduchess Margarethe Klementine of Austria.

Question: When did Princess Elisabeth Helene Of Thurn And Taxis's husband die?
Answer: 9 August 1968