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She is an ancestor of Prince Henri the Count of Paris, Orléanist pretender to the French throne.
Marie Therese married Prince Henri d'Orléans, second child and eldest son of Henri, Count of Paris and his wife Princess Isabelle of Orléans-Braganza, on 5 July 1957 in Dreux, Eure-et-Loir, France.
Through Madame de Montespan, he is an ancestor of Philippe Égalité, Louis-Philippe I, and Prince Henri, Count of Paris, the present Orléanist pretender to the French throne.
Finding himself in Brussels, with his uncles Prince François and Prince Henri, Duke of Aumale, in 1870 on the declaration of the Franco-Prussian War, the Duke of Chartres immediately requested Napoleon III's government for authorisation to fight in the conflict.