Maria Theresa was Emperor Charles VI's daughter.
Charles VI, Holy Roman Emperor . He married Elisabeth Christine of Brunswick-Wolfenbüttel , by whom he had his two children : Maria Theresa , born 1717 , the last Habsburg sovereign , and Maria Anna , born 1718 , Governess of the Austrian Netherlands . Maria Theresa . She started her 40-year reign when her father , Emperor Charles VI , died in October 1740 . Maria Theresa and her husband , Francis I , Holy Roman Emperor , had eleven daughters , including the Queen of France and Navarre , the Queen of Naples and Sicily , the Duchess of Parma , and five sons , including two Holy Roman Emperors , Joseph II and Leopold II .