Özet:

Five hundred years of Piast Dynasty rule in the country was over with the death of Kazimierz III (Casimir the Great), one of the most prominent leaders of Poland. Since he did not have a son to replace after him, he bequeathed his throne to the child of his nephew who at that time was married to the king of Hungary. Thus, after Kazimierz III´s death (1370) King Louis of Hungary ascended to the throne however Louis could not have any children. That´s why he was forced to sign a treaty with the Polish nobles granting them privileges in order to be able to get her daughter Jadwiga to take the throne. So after that treaty she became Queen of Poland in 1384. As soon as Jadwiga became a queen, the Polish barons began to seek a husband to her, and they saw fit for Prince Jagiełło of Lithuania. This marriage had a great importance for the future of the country. Because of the union that was formed between the two countries was a turning point for the history of Central and Eastern Europe due to changing the current political order. During that process the acreage of the Polish, Lithuanian and Ruthenian territories that combined with this manner had totally been reached to 800 thousand square kilometres. In our study, was prepared by using mainly foreign sources, through the first female leader of her country, in other words the `king´, was mentioned to the political and social life of Poland that became the most powerful state in the last quarter of the fourteenth century. In the final section of our paper, Queen Jadwiga´s importance is referred through some American newspapers related to her who lived in fourteenth century as she was still mentioned after 600 years of her death.

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