Marie Thérèse of France
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Marie-Thérèse (Marie-Thérèse Charlotte; 19 December 1778 – 19 October 1851) was the eldest child of King Louis XVI and Queen Marie Antoinette of France, and their only child to reach adulthood. In 1799, she married her cousin Louis Antoine, Duke of Angoulême, the eldest son of Charles X of France, henceforth becoming the Duchess of Angoulême. She became Dauphine of France upon the accession of her uncle and father-in-law, Charles X, to the French throne in 1824. On 2 August 1830, after the July Revolution, both Charles X and her husband signed an instrument of abdication 20 minutes apart. Some popular sources identify her to be a short-reigning Queen of France in the 20-minute interval between the signatures, but scholarly sources generally consider this to be a myth. She is, however, the undisputed legitimate Queen of France from 1836 to 1844 according to the Legitimists.