Francis II, Holy Roman Emperor
Francis II (12 February 1768 – 2 March 1835) was the last Holy Roman Emperor, ruling from 1792 until 6 August 1806, when he dissolved the Holy Roman Empire after the decisive defeat at the hands of the First French Empire led by Napoleon at the Battle of Austerlitz.
In 1804, he had founded the Austrian Empire and became Francis I, the first Emperor of Austria, ruling from 1804 to 1835, so later he was named the first "Doppelkaiser" (double emperor) in history.
For the two years between 1804 and 1806, Francis used the title and style "by the Grace of God elected Roman Emperor, ever Augustus, hereditary Emperor of Austria" and he was called the "Emperor of both the Holy Roman Empire and Austria".
He was also Apostolic King of Hungary, Croatia and Bohemia as Francis I.
He also served as the first president of the German Confederation following its establishment in 1815.
Francis II continued his leading role as an opponent of Napoleonic France in the Napoleonic Wars, and suffered several more defeats after Austerlitz.
The proxy marriage of the state of his daughter Marie Louise of Austria to Napoleon on 10 March 1810 was arguably his severest personal defeat.
After the abdication of Napoleon following the War of the Sixth Coalition, Austria participated as a leading member of the Holy Alliance at the Congress of Vienna, which was largely dominated by Francis's chancellor Klemens Wenzel,
Prince von Metternich culminating in a new European map and the restoration of Francis's ancient dominions (except the Holy Roman Empire which was dissolved).
Due to the establishment of the Concert of Europe, which largely resisted popular nationalist and liberal tendencies, Francis became viewed as a reactionary later in his reign.
Francis II's grandchildren include Napoleon II (Napoleon's only legitimate son), Franz Joseph I of Austria, Maximillian I of Mexico, Maria II of Portugal and Pedro II of Brazil.
Archduchess Marie Anne of Austria
Marie Anne of Austria(" Maria Anna Franziska Theresia Josepha Medarde"; 8 June 1804 – 28 December 1858) was an Archduchess of Austria and the daughter of Franz II, Holy Roman Emperor and his second wife, Maria Theresa of Naples and Sicily.
Prince Gennaro of Naples and Sicily
Gennaro of Naples and Sicily( Gennaro Carlo Francesco; 12 April 1780 – 1 January 1789) was a Prince of Naples and Sicily.
He died of smallpox at age 8.
He and his mother are the central figures of a portrait by Angelica Kauffman in 1783.
Maria Cristina of Naples and Sicily
Maria Cristina of Naples and Sicily (Maria Cristina Amelia Teresa; 17 January 1779 – 11 March 1849) was a Princess of Naples and Sicily and later Queen of Sardinia as wife of King Charles Felix.
Maria Theresa of Naples and Sicily
Maria Theresa of Naples and Sicily (6 June 1772 – 13 April 1807) was the last Holy Roman Empress and the first Empress of Austria by marriage to Francis II, Holy Roman Emperor.
She was the eldest daughter of Ferdinand IV & III of Naples and Sicily (later Ferdinand I of the Two Sicilies) (1751–1825) and Marie Caroline of Austria (1752–1814).
Princess Maria Cristina Amelia of Naples and Sicily
Maria Cristina Amelia of Naples and Sicily( 17 January
1779 – 26 February 1783) was a Princess of Naples and Sicily and twin sister of the future Queen of Sardinia.
She died of smallpox in 1783.
Prince Giuseppe of Naples and Sicily
Giuseppe of Naples and Sicily( Giuseppe Carlo Gennaro; 18 June 1781 – 19 February 1783) was the first" Prince of Naples and Sicily".
He died of smallpox aged 20 months, the title was later conferred by Joseph Bonaparte to be hereditary on his children and grandchildren.
Prince Alberto of Naples and Sicily
Alberto of Naples and Sicily (Alberto Lodovico Maria Filipo Gaetano; 2 May 1792 – 25 December 1798) was a Prince of Naples and Sicily.
He died on board , a British Royal Navy vessel.
Princess Maria Isabella of Naples and Sicily
Maria Isabelle of Naples and Sicily
( 2 December 1793 – 23 April 1801) was a member of the Bourbons of Naples and Sicily( itself descended from the Bourbons of France).
She was styled" Princess of Naples and Sicily".
Carlo, Duke of Calabria
Carlo of Naples and Sicily (4 January 1775 – 17 December 1778) was Duke of Calabria as heir to Naples and Sicily.

Question: Where did Maria Theresa Of Naples And Sicily's husband die?
Answer: Vienna