Kurzętnik – the ruins of the castle in Kurzętnik: The castle was built at the turn of the 13th and 14th century or in the 14th century. The exact date is unknown however as there is no mention of the castle from the period of Lithuanian raid of Gediminas we can assume that the construction was started after 1331. It was certainly completed before 1361. as mentions of Teutonic Order official residing at the castle are from this year.