Maria Theresa of Austria-Este (1849–1919)
Maria Theresa of Austria-Este (Maria Theresa Henriette Dorothee; 2 July 1849 – 3 February 1919) was the last Queen of Bavaria.
She was the daughter and only child of Archduke Ferdinand of Austria-Este and his wife, Archduchess Elisabeth of Austria.
Luigi Lucheni
Luigi Lucheni( 1873–1910) was an Italian anarchist and the assassin of Empress Elisabeth of Austria.
Duchess Elisabeth of Württemberg
Elisabeth of Württemberg (Elisabeth Wilhelmine Luise; 21 April 1767 – 18 February 1790) was an Archduchess of Austria by marriage to Archduke Francis of Austria.
Charles IX of France
Charles IX (27 June 1550 – 30 May 1574) was King of France from 1560 until his death in 1574 from tuberculosis.
He ascended the throne of France upon the death of his brother Francis II in 1560.
After decades of tension, war broke out between Protestants and Catholics after the massacre of Vassy in 1562.
In 1572, after several unsuccessful peace attempts, Charles ordered the marriage of his sister Margaret of Valois to Henry of Navarre (the future King Henry IV of France), a major Protestant nobleman who was in the line of succession to the French throne, in a last desperate bid to reconcile his people.
Facing popular hostility against this policy of appeasement, Charles allowed the massacre of all Huguenot leaders who gathered in Paris for the royal wedding at the instigation of his mother Catherine de' Medici.
This event, known as the St. Bartholomew's Day massacre, was a significant blow to the Huguenot movement, though religious civil warfare soon began anew.
Charles sought to take advantage of the disarray of the Huguenots by ordering the Siege of La Rochelle, but was unable to take the Protestant stronghold.
All of his decision-making was influenced by his mother Catherine de' Medici, a fervent Roman Catholic who initially sought peace between Catholics and Protestants, but after the St. Bartholomew's Day Massacre supported the persecution of Huguenots.
Charles died of tuberculosis in 1574, without legitimate male issue, and was succeeded by his brother Henry III.
Elisabeth of the Palatinate
Elisabeth of the Palatinate( 26 December 1618 – 11 February 1680), also known as Elisabeth of Bohemia, Princess Elisabeth of the Palatinate, or Princess- Abbess of Herford Abbey, was the eldest daughter of Frederick V, Elector Palatine( who was briefly King of Bohemia), and Elizabeth Stuart.
Elisabeth of the Palatinate is a philosopher best known for her correspondence with René Descartes.
She was critical of Descartes' dualistic metaphysics and her work anticipated the metaphysical concerns of later philosophers.
Karl Theodor, Duke in Bavaria
Karl- Theodor, Duke in Bavaria( 9 August 1839 – 30 November 1909), was a member of the House of Wittelsbach and a professional oculist.
He was the favorite brother of the Empress Elisabeth of Austria, and father of Queen Elisabeth of the Belgians.
Elisabeth of Austria, Queen of France
Elisabeth of Austria (5 July 1554 – 22 January 1592) was Queen of France from 1570 to 1574 as the wife of King Charles IX.
A member of the House of Habsburg, she was the daughter of Maximilian II, Holy Roman Emperor, and Maria of Spain.
Archduchess Sophie of Austria
Archduchess Sophie of Austria( 5 March 185529 May 1857) was the first child and first of three daughters born to Franz Joseph I, Emperor of Austria, and Elisabeth of Bavaria.
She died aged two.
Archduke Otto of Austria (1865–1906)
Archduke Otto Franz Joseph Karl Ludwig Maria of Austria (21 April 1865 – 1 November 1906) was the second son of Archduke Karl Ludwig of Austria (younger brother of Emperor Franz Joseph I of Austria) and his second wife, Princess Maria Annunciata of Bourbon-Two Sicilies.
He was the father of Charles I of Austria, the last Emperor of Austria.
Archduchess Elisabeth of Austria (1922–1993)
Archduchess Elisabeth of Austria( 31 May 1922 – 6 January 1993) was a member of the House of Habsburg- Lorraine.
She was the youngest daughter of Charles I, the last Emperor of Austria, and his wife, Princess Zita of Bourbon- Parma.

Question: What is the cause of death of Elisabeth Of Austria, Queen Of France's husband?
Answer: tuberculosis