Maria Ludovika of Austria-Este
Maria Ludovika of Austria- Este, also known as Maria Ludovika of Modena,( 14 December 1787 – 7 April 1816) was the daughter of Archduke Ferdinand of Austria- Este( 1754 – 1806) and his wife, Maria Beatrice Ricciarda d' Este( 1750 – 1829).
She was a member of the House of Austria- Este, a branch of the House of Habsburg- Lorraine.
Princess Luisa Maria of Belgium, Archduchess of Austria-Este
Princess Luisa Maria of Belgium, Archduchess of Austria- Este( Luisa Maria Anna Martine Pilar; born 11 October 1995) is the fourth child and second daughter of Lorenz, Archduke of Austria- Este, and Princess Astrid of Belgium.
She was born at the Saint Jean Hospital in Brussels, Belgium, and is currently ninth in line to the Belgian throne.
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.
Ferdinand Karl, Archduke of Austria-Este
Archduke Ferdinand Karl of Austria-Este (Ferdinand Karl Anton Joseph Johann Stanislaus; 1 June 1754 – 24 December 1806) was a son of Holy Roman Emperor Franz I and Maria Theresa of Austria.
He was the founder of the House of Austria-Este and Governor of the Duchy of Milan between 1765 and 1796.
He was also designated as the heir to the Duchy of Modena and Reggio, but he never reigned, owing to the Napoleonic Wars.
Princess Franziska of Hohenlohe-Waldenburg-Schillingsfürst
Princess Franziska of Hohenlohe-Waldenburg-Schillingsfürst
(Franziska Maria Anna; 21 June 1897 – 12 July 1989) was the wife of Archduke Maximilian Eugen of Austria.
Prince Joachim of Belgium, Archduke of Austria-Este
Prince Joachim of Belgium, Archduke of Austria- Este(" Joachim Karl- Maria Nikolaus Isabelle Marcus d' Aviano"; born 9 December 1991), is the younger son and third child of Lorenz, Archduke of Austria- Este and Princess Astrid of Belgium.
Princess Elisabetta of Belgium
Princess Elisabetta of Belgium, Archduchess of Austria- Este( née" Nob." Elisabetta Rosboch von Wolkenstein on 9 September 1987) is the wife of Prince Amedeo of Belgium, Archduke of Austria- Este.
Archduke Maximilian of Austria-Este
Archduke Maximilian Joseph of Austria-Este (July 14, 1782 – June 1, 1863), the fourth son of Archduke Ferdinand of Austria-Este and younger brother of Francis IV, Duke of Modena.
He was grand master of the Teutonic Knights from 1835 to 1863.
Maria Theresa of Austria-Este, Queen of Sardinia
Maria Theresa of Austria-Este (Maria Theresia Josefa Johanna; 1 November 1773 – 29 March 1832) was born an archduchess of Austria-Este and a princess of Modena.
She was later queen of Sardinia as wife of Victor Emmanuel I of Sardinia.
Prince Lorenz of Belgium, Archduke of Austria-Este
Prince Lorenz of Belgium, Archduke of Austria- Este( born 16 December 1955) is a member of the Belgian royal family by his marriage with Princess Astrid of Belgium.
Since 1996 he is also head of the House of Austria- Este, a cadet branch of the former Imperial Austrian House of Habsburg- Lorraine.

Question: When did Archduke Maximilian Of Austria-Este's father die?
Answer: 24 December 1806