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Maria Amalia (Maria Amalia Josepha Johanna Antonia; 26 February 1746 – 18 June 1804) was the Duchess of Parma, Piacenza and Guastalla by marriage. Maria Amalia was a daughter of Empress Maria Theresa and Emperor Francis I. She was thus younger sister to Joseph II, Holy Roman Emperor and older sister to Leopold II, Holy Roman Emperor, Maria Carolina, Queen of Naples and Marie Antoinette, Queen of France.