 Complete the following phrase:  Princess Marie Thérèse Louise of Savoy 8 September 1749  3 September 1792 was a member of the Savoy-Carigo cadet branch of the House of Savoy. She was married at the age of 17 to Louis Alexandre de Bourbon-Penthièvre, Prince de Lamballe, the heir to the greatest fortune in France. After her marriage, which lasted a year, she went to court and became the confidante of Queen Marie Antoinette. She was killed in the 