Bobrowniki castle was erected at the turn of the fourteenth and fifteenth centuries, after the purchase of Bobrowniki village by the Teutonic Knights in 1392, possibly as an extension of an earlier fortress. It was located on the site of an old stronghold, founded by the duke of Dobrzyn, Ladislaus the hump-backed. Due to the close proximity to the country border, the elders of Dobrzyn constantly improved the fortifications around the castle, which became the seat of the local government. In 1405 Wladyslaw Jagiello purchased Dobrzyn and Bobrowniki, but four years later the Teutonic Knights attacked the castle. With the help of a treason of the defending commander Bobrowniki castle went back into Teutonic hands only to be returned in 1411 back to the Polish. It's border location has once aga