The Altar of the Three Millenia

The rule of the Jagiellonian dynasty in Poland between 1385 and 1572 spans the Late Middle Ages and the Early Modern Period in European history. The Lithuanian Grand Duke Jogaila founded the dynasty; his marriage to Queen Jadwiga of Poland in 1386 strengthened an ongoing Polish–Lithuanian union. The partnership brought vast territories controlled by the Grand Duchy of Lithuania into Poland's sphere of influence and proved beneficial for both the Polish and Lithuanian people, who coexisted and cooperated in one of the largest political entities in Europe for the next four centuries.

SUMMARY FROM WIKIPEDIA (CC BY-SA) · HISTORY OF POLAND DURING THE JAGIELLONIAN DYNASTY ↗