The first mention of Debrzno, also known as Friedland, comes from the mid-fourteenth century. In 1354, the Teutonic Order gave the town the location privilege. At the initiative of the Order, town was also fortified with brick defensive walls. In 1466, the Toruń Peace turned Debrzno to the borders of Poland. From the later period, there is no mention of defensive walls. It is known that during wars and other natural disasters the town suffered numerous construction losses, and the fortifications were weakened. In the mid-nineteenth century, there were no longer walls from the east and south. In the second half of the nineteenth century, subsequent parts of the walls were demolished along with all town gates.
The town’s area within the fortifications was 7 ha, and the length of the line of walls was 1140 meters. The defensive wall was built of brick in the flemish bond, on a high plinth of granite boulders. Thickness of the walls reached up to 2 meters and wall reached up to 8 meters in height. It is possible that it was crowned with battlements. There were three gates in the walls: Main, Mill, also called Złotowska and Fisher. The entire circuit of walls also had 11 towers spaced every 28-30 meters, having a rectangular shape measuring 9×6 m and protruding from the face of the defensive wall.
Four rectangular towers have survived to this day, of which two are only in fragments. In addition, in the south-west corner of the town, there is the lower part of the Mill Tower, also known as the Tower of Witches. As the urban legend says, the trials and executions of women accused of witchcraft took place in it. In recent times, it has been superstructured with an ugly, modern and colliding crowning.
Lukas E, Średniowieczne mury miejskie na Pomorzu Zachodnim. Poznań 1975.
Ptaszyńska D., Miejskie mury obronne w województwie koszalińskim, Koszalin 1974.