"Marie-Thérèse Charlotte of France (19 December 1778 – 19 October 1851), Madame Royale, was the eldest child of Louis XVI and Marie Antoinette, and the only ...
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one to reach adulthood (her siblings all dying before the age of 11). She was married to Louis Antoine, Duke of Angoulême, who was the eldest son of the future Charles X, her father´s younger brother; thus the bride and groom were also first cousins.
After her marriage, she was known as the Duchess of Angoulême. She became the Dauphine of France upon the accession of her father-in-law to the throne of France in 1824. Technically she was Queen of France for twenty minutes, on 2 August 1830, between the time her father-in-law signed the instrument of abdication and the time her husband, reluctantly, signed the same document." - (en.wikipedia.org 09.12.2020)
