Battle of Grunwald

Date: July 15, 1410 • Location: Gierzwałd, Poland

The Kingdom of Poland and the Grand Duchy of Lithuania defeated the Teutonic Knights at the Battle of Grunwald, the decisive engagement of the Polish–Lithuanian–Teutonic War.

The Crown of the Kingdom of Poland, commonly known as the Polish Crown, was a political and legal concept that developed in the Kingdom of Poland during the 14th century. It expressed the idea of the kingdom as a permanent political entity, distinct from the person of its reigning monarch and possessing its own rights, institutions, and territories.