Regent
At the death of her husband, she was regarded as the rightful heir to the Hungarian throne, and she took control of Hungary as regent. She was pregnant, and she was convinced the child was a son. She prepared for the election of the next monarch of Hungary and formed a political party of followers. Among her followers were her mother's family Cilli, Ulrich Cylejskiego, the greatest fief holder in Hungary, Szécsich, Garaiów and the cities, and appointed followers to the posts of arch bishop and governor of the royal castle. By 1440, Elisabeth was the de facto ruling monarch of Hungary, and her orders were respected and carried out, though she was not yet elected by the council and confirmed as such. On 1 January 1441, the Hungarian council gathered to elect a monarch. The decision was, that because of the threats from the Ottoman Empire, Elisabeth could not be elected as monarch, but a warlord and a military leader was needed. There were also suggestions that Elisabeth should marry the male elected to be monarch. In the end, Vladislaus of Poland was elected King of Hungary.
Read more about this topic: Elizabeth Of Luxembourg