Marie-Thérèse,_Duchess_of_Angoulême--Christine_of_France

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, Count of Artois, henceforth becoming the Duchess of Angoulême. She was briefly Queen of France in 1830.
She became Dauphine of France upon the accession of her uncle and father-in-law, Charles X, to the French throne in 1824.
She was queen 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.