Thirteen Years' War (1454–1466) in the context of "Teutonic Order"

Nicolaus Copernicus (19 February 1473 – 24 May 1543) was a Renaissance polymath who formulated a model of the universe that placed the Sun rather than Earth at its center. The publication of Copernicus's model in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), just before his death in 1543, was a major event in the history of science, triggering the Copernican Revolution and making a pioneering contribution to the Scientific Revolution. Though a similar heliocentric model had been developed eighteen centuries earlier by Aristarchus of Samos, an ancient Greek astronomer, Copernicus likely arrived at his model independently.

Copernicus was born and died in Royal Prussia, a semiautonomous and multilingual region created within the Crown of the Kingdom of Poland from lands regained from the Teutonic Order after the Thirteen Years' War.

The Peace of Thorn or Toruń of 1466, also known as the Second Peace of Thorn or Toruń (Polish: drugi pokój toruński; German: Zweiter Friede von Thorn), was a peace treaty signed in the Hanseatic city of Thorn (Toruń) on 19 October 1466 between the Polish king Casimir IV Jagiellon and the Teutonic Knights, which ended the Thirteen Years' War, the longest of the Polish–Teutonic Wars.

The treaty was signed in the Artus Court, and afterward a mass was held in the Gothic Franciscan Church of the Assumption of the Blessed Virgin Mary to celebrate the peace treaty.

The Prussian Confederation (German: Preußischer Bund, Polish: Związek Pruski) was an organization formed on 21 February 1440 at Marienwerder (present-day Kwidzyn) by a group of 53 nobles and clergy and 19 cities in Prussia, to oppose the arbitrariness of the Teutonic Knights. It was based on an earlier similar organization, the Lizard Union established in 1397 by the nobles of Chełmno Land.

In 1454, the leader of the Confederation, Johannes von Baysen (Jan Bażyński), formally asked King Casimir IV Jagiellon, to incorporate Prussia into the Kingdom of Poland. This marked the beginning of the Thirteen Years' War between the Order's State and Poland, with the cities co-financing the military costs of the latter.