The castle in Radziki Duże was probably built for the castellan of Dobrzyń, Andrzej of Radziki in the third or fourth quarter of the fourteenth century. He belonged to the Ogończyk family, who eventually began to use the Radzikowski family name. In 1510, the castle was rebuilt by Mikołaj Radzikowski. The building was in the hands of his descendants until the mid-16th century. Later the castle belonged to Pilecki, then to the Rolicz Tarnowski families. After the Swedish invasion in the 17th century, it lost its significance and was already a ruin in the 19th century.
The castle was built of brick on a stone foundation, with a square layout of side about 29 meters long. It consisted of perimeter walls and a main residential house with three floors above ground, the lowest of which contained three square rooms of a comparable size. On the axis of the south-eastern curtain, in front of the house, there was an gatehouse, extended from the front of the walls. In the courtyard there were probably other wooden buildings. Originally, the castle was protected by the moat watered from the pond.
The castle is in the form of an advanced ruin. The best preserved building elements are the walls of the main residential building, but internal divisions have not survived. At present the ruins are located in a fenced-in school, which may make sightseeing difficult.
Lasek P., Obronne siedziby rycerskie i możnowładcze w czasach Kazimierza Wielkiego [w:] Wielkie murowanie. Zamki w Polsce za Kazimierza Wielkiego, red. A.Bocheńska, P. Mrozowski, Warszawa 2019.
Leksykon zamków w Polsce, red. L.Kajzer, Warszawa 2003.