 Maria Theresa blamed herself for her daughter's death for the rest of her life because, at the time, the concept of an extended incubation period was largely unknown and it was believed that Maria Josepha had caught smallpox from the body of the late empress.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.