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1766, for the political needs of the French royal family formally to 11-year-old Marie Antoinette princess to marry him. Austrian court readily agreed. Marie Antoinette set foot on French territory at age 14, became a French prince, Louis Auguste de Bourbon (ie, the future Louis XVI) of the Crown Princess.
Prinzessin Ileana von Rumänien / Princess Ileana (1909-1991), the youngest daughter of King Ferdinand and consort Queen Marie. After marriage she was known as Her Imperial and Royal Highness, Archduchess of Austria, Princess Imperial of Austria, Princess Royal of Hungary and Bohemia, Princess of Tuscany, Princess of Romania, Princess of Hohenzollern.