There, on 10 June 1799, he married his first cousin, Princess Marie Thérèse of France, the eldest child of Louis XVI and Marie Antoinette, and the only member of the immediate royal family to survive the French Revolution.
There, on 10 June 1799, he married his first cousin, Princess Marie Thérèse of France, on the instigation of their common uncle Louis XVIII. Marie Therese was the eldest child of Louis XVI and Marie Antoinette, and the only member of the immediate royal family to survive the French Revolution.