 In April 1770 , Maria Theresa 's youngest daughter , Maria Antonia , married Louis , Dauphin of France , by proxy in Vienna . Maria Antonia 's education was neglected , and when the French showed an interest in her , her mother went about educating her as best she could about the court of Versailles and the French . Maria Theresa kept up a fortnightly correspondence with Maria Antonia , now called Marie Antoinette , in which she often reproached her for laziness and frivolity and scolded her for failing to conceive a child . 
