Princess Marie of Hanover
Princess Marie of Hanover (2 December 1849 – 4 June 1904) was the younger daughter of King George V of Hanover and of his wife, Princess Marie of Saxe-Altenburg.
Archduchess Elisabeth Marie of Austria
Archduchess Elisabeth Marie of Austria (Elisabeth Marie Henriette Stephanie Gisela; 2 September 1883 – 16 March 1963) was the only child of Rudolf, Crown Prince of Austria and Princess Stéphanie of Belgium, and a granddaughter of Emperor Franz Joseph I of Austria and King Leopold II of the Belgians.
She was known to the family as "Erzsi", a diminutive of her name in Hungarian.
Later nicknamed "The Red Archduchess", she was famous for becoming a socialist and a member of the Austrian Social Democratic Party.
Archduchess Karoline Marie of Austria
Archduchess Karoline Marie of Austria  (5 September 1869, Altmünster, Upper Austria, Austria–Hungary – 12 May 1945, Budapest, Hungary) was a member of the House of Habsburg-Tuscany and Archduchess of Austria, Princess of Tuscany by birth.
Through her marriage to Prince August Leopold of Saxe-Coburg and Gotha, Karoline was also a member of the Koháry branch of the House of Saxe-Coburg and Gotha.
Karoline was the fourth child and second eldest daughter of Archduke Karl Salvator of Austria and his wife Princess Maria Immaculata of Bourbon-Two Sicilies.
She was Princess-Abbess of the Theresian Royal and Imperial Ladies Chapter of the Castle of Prague (1893-1894).
Princess Maria Immaculata of Bourbon-Two Sicilies (1844–1899)
Princess Maria Immaculata of Bourbon-Two Sicilies (Full Italian name: "Maria Immacolata Clementina, Principessa di Borbone delle
Due Sicilie")
(14 April 1844, Naples, Kingdom of the Two Sicilies – 18 February 1899, Vienna, Austria) was fifth child and second-eldest daughter of Ferdinand II of the Two Sicilies and his wife Maria Theresa of Austria.
Through her marriage to Archduke Karl Salvator of Austria, Maria Immaculata became an Austrian Archduchess.
Stéphanie Windisch-Graetz
Princess Stéphanie Windisch- Graetz( 17 July 1939 – 12 July 2019) was the daughter of Prince Franz Joseph zu Windisch- Graetz and granddaughter of Archduchess Elisabeth Marie of Austria.
Archduchess Elisabeth was the daughter of Rudolf, Crown Prince of Austria and granddaughter of Emperor Franz Joseph I of Austria.
She became an artist, known for her photographic portraits using only candles as a source of light, and for her sensual images from the animal world.
She married Dermot Blundell- Hollinshead- Blundell( 1935 –2009).
They were the parents of Henry Victor William Blundell- Hollinshead- Blundell( born 1967) and Alexander Otto Blundell- Hollinshead- Blundell( born 1969) who adopted the surname of his mother in 2011.
She had one younger brother, Prince Guillaume Franz Josef Maria Windisch- Graetz( born 1950; unmarried).
She died in a hospital in Sint- Lambrechts- Woluwe on 12 July 2019 due to complications after a heart operation.
Archduchess Maria Carolina of Austria (1740–1741)
Archduchess Maria Carolina of Austria (
Maria Carolina Ernestina Antonia Johanna Josefa; 12 January 1740 – 25 January 1741), was the third child and daughter of Archduchess Maria Theresa of Austria, later Holy Roman Empress and Duke Francis of Lorraine.
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 Margaret of Austria (nun)
Margaret of Austria( 1536 – 1567) was an Archduchess of Austria.
Archduke Joseph Árpád of Austria
Archduke Joseph Árpád Benedikt Ferdinand Franz Maria Gabriel (8 February 1932 – 30 April 2017) was a member of the Hungarian Palatine branch of the House of Habsburg-Lorraine.
He was born in Budapest, the son of Archduke Joseph Francis of Austria and his wife, Princess Anna of Saxony.
He was the great-grandson of Archduchess Gisela of Austria.
He received a degree in economics from the University of Lisbon.
Archduchess Maria Elisabeth of Austria (1737–1740)
Archduchess Maria Elisabeth of Austria( Full name( German):" Maria Elisabeth Amalia Antonia Josefa Gabriele Johanna Agathe"; 5 February 1737 – 7 June 1740), was the eldest child and daughter of Archduchess Maria Theresa of Austria, later Queen of Hungary and Bohemia, and Duke Francis of Lorraine, later Francis I, Holy Roman Emperor.

Question: Where did Archduchess Karoline Marie Of Austria's mother die?
Answer: Vienna