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In page Maria of Calabria:

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Maria's grandfather died on 20 January 1343. By the provisions of his will, her elder sister Joanna was to become ruler of Naples, while Maria was not only given the County of Alba and a vast inheritance[citation needed] but also was confirmed to be betrothed to Louis I of Hungary,[4] or in the case that this union never happened, the King of Naples instructed that she then could marry John, Duke of Normandy, heir of the French throne (although he was already married since 1332).