Princess Stephanie of Windisch-Graetz's mother was a member of what political party?
Archduchess Elisabeth Marie of Austria Archduchess Elisabeth Marie of Austria (Elisabeth Maria Henriette Stephanie Gisela; 2 September 1883 – 16 March 1963) was the only child of Rudolf, Crown Prince of Austria and Princess Stéphanie of Belgium, and a granddaughter of Emperor Franz Joseph I of Austria and King Leopold II of the Belgians. She was known to the family as "Erzsi", a diminutive of her name in Hungarian. Later nicknamed "The Red Archduchess", she was famous for becoming a socialist and a member of the Austrian Social Democratic Party.
Archduchess Agnes Christina of Austria Archduchess Agnes Christina of Austria (German: "Agnes Christina, Erzherzogin von Österreich, Prinzessin von Toskana" ; 14 December 1928 – 31 August 2007) was a member of the Tuscan line of the House of Habsburg and an Archduchess of Austria and a Princess of Tuscany by birth. She was the great-granddaughter of Emperor Franz Joseph of Austria-Hungary.