Siege of Marienburg
1457 CE.
Shown on the map at 54.029°, 19.044°.
The siege of Malbork took place between September 28, 1457 and August 5, 1460, during the Thirteen Years' War. The Teutonic Knights tried to regain the fortress (Ordensburg) of Malbork (or Marienburg), which had been the capital of their state, but was captured by the Kingdom of Poland in June 1457. The Knights, commanded by Bernard Szumborski, failed to do so, and Malbork remained in Polish hands, becoming the seat of Malbork Voivodeship.
Text from the Wikipedia article Siege of Marienburg (1457–1460), licensed CC BY-SA 4.0.