Elizabeth of Luxembourg

Elizabeth of Luxembourg (Hungarian: Luxemburgi Erzsébet, Luxembourgish: Elisabeth vu Lëtzebuerg; 7 October 1409 – 19 December 1442) was queen consort of Hungary, queen consort of Germany and Bohemia.

The only child of Sigismund, Holy Roman Emperor, King of Hungary and Bohemia, Elizabeth was expected to ascend his thrones along with her husband, Albert II of Germany. After her father's death, Elizabeth and her husband were elected by the Hungarian estates as de facto equal rulers.

She could not completely assert her position, however, because the Veszprém bishop refused to give up on his right to crown the queen (the monarch was traditionally crowned by the Esztergom bishop). She was, however, recognised as co-ruler and played an active part in the government. After Albert's death, however, she was unable to prevent the election of a new king.

Albert died in 1439, leaving Elizabeth a pregnant dowager with two daughters, Anne and Elizabeth. Bohemian nobility proclaimed an interregnum, while Władysław III of Poland was crowned new king of Hungary in May 1440, three months after Queen Elizabeth delivered a son, Ladislaus the Posthumous. She was determined to contend for her patrimony on her son's behalf, which led to a civil war between her and Władysław III's supporters. The conflict ended with the queen's sudden death at the age of 33.

Source: Wikipedia — https://en.wikipedia.org/wiki/Elizabeth_of_Luxembourg