Archduchess Mechthildis of Austria Austrian Archduchess (1891–1966) (1891–1966) Parents Archduchess Maria Theresa of Austria Archduke Charles Stephen of Austria Children Prince Alexander Czartoryski Prince Constantine Czartoryski Princess Izabela Czartoryska Princess Cecilie Czartoryska Siblings Archduke Leo Karl of Austria Archduke Karl Albrecht of Austria Archduchess Eleonora of Austria Archduchess Renata of Austria Archduke Wilhelm of Austria Partners Prince Olgierd Jan Pawel Antoni Czartoryski
