Princess Stephanie of Windisch-Graetz's mother was a member of what political party?
Princess Stephanie of Windisch-Graetz Princess Stéphanie of Windisch-Graetz (April 4, 1909 in Ploskovice, Bohemia – May 29, 2005 in Uccle, Belgium) was the daughter of Prince Otto Weriand of Windisch-Graetz (1873–1952) and Archduchess Elisabeth Marie of Austria (1883–1963), only child of Crown Prince Rudolf of Austria and Princess Stéphanie of Belgium. She was the great-grandchild of Emperor Franz-Joseph and Empress Elisabeth ('Sissi') of Austria. She was also the great-grandchild of King Leopold II of Belgium.
Marie of Prussia Marie of Prussia (German: "Marie Friederike Franziska Hedwig von Preußen" ; October 15, 1825 – May 17, 1889) was Queen of Bavaria and the mother of Kings Ludwig II and Otto of Bavaria.