Catherine of Hungary

Catherine of Hungary or Catherine of Anjou was heiress presumptive to the thrones of Hungary and Poland as eldest living child of King Louis the Great and his second queen, Elizabeth of Bosnia. When she was only four years old, she was betrothed to Louis, a younger son of King Charles V of France and future Duke of Orléans. Their marriage was supposed to establish a connection between the two branches of the French royal house. Her father made a set of concessions to the Polish noblemen in exchange for recognizing Catherine (or one of her sisters) as sovereign of Poland after his death. This agreement is known as the Privilege of Koszyce. Catherine died aged seven, predeceasing both her father and her cousin Joanna. The agreement between her father and the noblemen became null and void. Catherine's youngest sister Hedwig eventually became monarch of Poland. Her other sister Mary, who was betrothed to her fiancé, became heiress presumptive and eventually monarch of Hungary.