The castle in Złotoria - a castle located in Złotoria, at the estuary of the Drwęca River to the Vistula, was built in the middle of the fourteenth century, one of the most important fortresses in the area of ​​Polish-Teutonic conflicts, now in ruins.

The castle was built in 1343 at the behest of King Kazimierz Wielki, in order to protect the border of the Dobrzyn region and to control the activities of the Teutonic Knights in Toruń. The castle was erected on the site of the wooden castle of the Mazovian princes, which existed since the early Middle Ages. After the death of Casimir the Great in 1370, the castle fell to Kaupka Slupski, but on September 9, 1373 it was taken by the prince Gniewkowski Wladyslaw White, who secretly captured the Burgurgian castle Nicholas Romlika. Soon, however, counting on the grace of King Ludwik of Hungary, Władysław Biały returns him the castle. On August 16, 1375, Wladyslaw White, with the help of the Burgundian knights, re-mastered the castle and organized invasions of Kujawy, which resulted in the invasion of the royal army of Ludwik of Hungary on June 1, 1376, which began the siege of the castle. During the siege of the castle in July 1376, Prince Kaźko Słupski was wounded and he died after a few months. In early 1377 Władysław Biały surrendered the castle to the royal army. In the years 1379-1392 the castle belonged to Władysław Opolczyk, who received him from Ludwik Węgierskiego with Dobrzyń land and part of Kujawy. His good relations with the Teutonic Knights made him in May 1391 illegally handed over the castle to the Order for 50 thousand. Florins, including It became the cause of the King Jagiello's conflict with the prince. In 1404, Władysław Jagiełło bought him by the agreement with Raciąza. On September 2, 1409, after an eight day siege by the Teutonic Knights, it was captured and destroyed at the behest of Grand Master Ulrich von Jungingen. The Polish crew of the castle was cut off. In May 1411, the sealed documents of the Toruń Peace Room were exchanged on the field, under which the castle returned to the Kingdom of Poland, and the Teutonic Knights undertook to pay damages for the destruction of about 3 tons of silver. The second peace of Torun eventually contributed to the loss of the military importance of the castle in Złotoria, as the state border to the Drwęca was no longer present. At the beginning of the 19th century it was partially demolished, which was abandoned due to the very strong mortar used for construction.

The castle was gothic, as a building block used heavily burnt bricks. It was erected on the plan of an elongated rectangle, consisting of a residential building surrounded by a walled courtyard, a towering defensive tower, and an enclosed courtyard. From the east, surrounded by moat. The area of ​​the castle was about 1750 m². The preserved elements are a fragment of a square tower in two storeys, a part of the perimeter walls and walls.