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In page Elizabeth of Kuyavia:

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Stephen outlived Elizabeth. It is unknown what Elizabeth died of. Judging by the time, it is possible that she died of Black Death, which was sweeping across Europe during the 14th century.[citation needed] Banness Elizabeth was buried in Bobovac in a tomb which she shared with her husband, brother-in-law Vladislaus and sister-in-law Jelena.[3] After Elizabeth of Kuyavia's death, her daughter Elizabeth was fostered by the Hungarian queen dowager Elizabeth and this soon led to Elizabeth's marriage to Louis I of Hungary.