After the Polish victory in the Battle of Grunwald in 1410, the town was briefly captured by Poles led by King Władysław II Jagiełło.

[4] In 1440 the town joined the anti-Teutonic Prussian Confederation, and upon its request in 1454 Polish King Casimir IV Jagiellon signed the act of incorporation of the region along with Reszel to Poland,[5] an event that sparked the Thirteen Years' War.

In 1455, the Teutonic Knights captured the town and in 1462 ceded their power to the Warmian bishop, who once more in 1464 recognized the Polish King as the rightful ruler of Warmia with Reszel.

[6][7] In the 17th century, the Jesuits came to Reszel and established a college in 1632 and the Polish King John II Casimir Vasa created a scholarship fund for its students.

Large fragments of preserved defensive walls and the Classicist town hall in the market square dating back to the 19th century are also worth visiting.