Władysław II Jagiełło became King of Poland through a momentous coronation held in Wawel Cathedral, Kraków, solidifying his authority and marking a significant political union between Poland and Lithuania. At the ceremony, Jagiełło, previously the Grand Duke of Lithuania, took the crown alongside Queen Jadwiga, following their marriage which had political ramifications aimed at uniting their realms against mutual threats, especially from Teutonic Knights. Jagiełło's acceptance of Christianity facilitated the unification of the predominantly pagan Lithuania with the Catholic Poland, promoting religion as a unifying factor in the region.

This coronation not only symbolized the new political landscape of Eastern Europe but also heralded a period of cultural and religious transformation. The merging of the two states was not merely a dynastic union; it had profound implications for the social and political dynamics in Central Europe. The coronation ceremony itself was laden with tradition, showcasing the merging of Polish and Lithuanian cultural elements, and was attended by various dignitaries from across Europe, establishing Władysław's significance in the broader European context.

Furthermore, Jagiełło's reign initiated a gradual shift towards greater centralization of power, and he played a pivotal role in the eventual strong emergence of the Polish-Lithuanian Commonwealth in the next century. This period would be marked by military successes against the Teutonic Order, culminating in crucial victories that defined Polish-Lithuanian relations for decades to come.