Archduchess Mechthildis was educated by private tutors, special emphasis was placed on languages. She learned German, Italian, English, French, and from 1895, Polish. Her father had followed a career in the Austrian Navy and Mechthildis spent her formative years primarily in Istria in the then-Austrian port of Pula in the Adriatic. Her father was very wealthy and the family had a winter residence in the island of Losinj in the Adriatic, and a palace in Vienna. In 1895 her father inherited vast properties in Galicia from Archduke Albert, Duke of Teschen. From 1907 the family's main residence was in Saybusch Castle in western Galicia.
Marriage
Archduchess Mechthildis and her husband Prince Olgierd Czartoryski, 1913.
Archduke Charles Stephen put aside his career in the navy and centered his ambitions in creating a Polish branch of the house of Habsburg. He encouraged all of his children to become Polish and Archduchess Mechtildis, like her sister Archduchess Renata, married a Polish Prince, Olgierd Czartoryski, in 1913. The marriage took place on 11 January 1913 at Saybusch Castle, two days after her eldest sister Archduchess Eleonora married Alfons von Kloss. Mechtildis had to renounce all of her titles, along with the style of Imperial and Royal Highness, since Prince Olgierd Czartoryski did not belong to a royal family. The couple had four children, two sons and two daughters, and lived on a Czartoryski estate in Poland. At the outbreak of World War II they fled to South America and stayed initially at Petropolis with members of the Brazilian imperial family, the Orléans-Braganza. Prince Olgierd was for many years the Ambassador of the Sovereign Military Order of Malta to Brazil and Paraguay. Archducess Mechthildis died on 6 February 1966 in Rio de Janeiro, her husband eleven years later. They have descendants in Brazil and in Europe.
Children
Archduchess Mechthildis and her husband Prince Olgierd Czartoryski (1888–1977) had four children:
Prince Constantine Czartoryski (9 December 1913 – 31 August 1989); married Countess Karolina Plater-Zyberk
Princess Cecylia Czartoryska (9 April 1915 – 19 April 2011); married Count Jerzy Rostworowski.
Generations are numbered by male-line descent from Frederick III, Holy Roman Emperor. Later generations are included although Austrian titles of nobility were abolished and outlawed in 1919.
