The construction of defensive walls in Chełmno began in the second half of the 13th century. The record from 1267 informed that the townspeople started construction works on brick fortifications, perhaps preceded by earlier wooden and earth fortifications. It is not certain whether the Teutonic Knights defensive court, which was connected with them, was erected sooner or later.
In the first quarter of the fourteenth century, the city walls were raised. In the 15th and 16th centuries the walls underwent further modernizations, as a result of which they were raised again, and in 1563 the battlements were walled up. Damages made during the Wars of Sweden were renewed in 1678. Walls were also repaired in the 19th century, but in the years 1860-1870, demolition of all gates except Grudziądz Gate, and a part of the walls south of it, were carried out.
The wall’s circuit was over 2,300 meters. The defensive wall was built of bricks in the monk bond on the foundation of erratic boulders. The original walls with unknown finishes were raised in height in the first quarter of the fourteenth century and equipped with battlement, then embedded in the wall, raised once more at the turn of the fifteenth and sixteenth centuries. The walls also had an offset from the inside (town side), on which was placed a wooden porch connected to the towers and gates.
The town had 25 or 27 towers, presenting various types. Of these, 18 towers were erected on a rectangular plan. They were protruding from the face of the wall and open from the town side. The division into floors was provided by timber, flat ceilings embedded in side holes, enabling access to arrowslits. Five towers were built on the semi-circular plan, all in the southern part of the perimeter. The arrangement of the towers was not regular, they were more densely located on the more vulnerable fragments of fortifications. Many of them were erected on the southern side, where the slopes of the hill were relatively gentle, also on the flat (though protected by ditch) the north-east side, the spacing between them was not large. In the later medieval times part of the half-towers (opened from inside) were walled up from the town side, placing rooms necessary for the town (e.g. the Powder Tower).
Access to the town was made possible by the gates located at the outlets of the main streets: Fishery and Water gates on the north-west side, Grudziądzka (Grubińska) gate from the north-east, Franciscans Gate on the west, Bridge Gate from the south-west, Toruńska Gate (Holy Spirit Gate) in the south and the less significant Weaving Gate in the south-east. In addition, there was also a Merseburg Gate recorded in the documents, that is difficult to determine (perhaps it was identical to the Mestwin Tower, originally equipped with a gate passage). A significant section of the perimeter on the southern side and partly from the east did not have access to the town. Grudziądzka and Toruńska gates were preceded by foregates, the former also had a drawbridge together with the Weaving Gate, due to its location in front of the ditch. All gates were placed in four-sided towers with passages in the ground floor.
Chełmno, as one of the few Polish cities, can boast of an almost fully preserved circumference of the medieval defensive walls. It is currently 80% of their original length with 23 towers preserved. The most interesting of these are: Powder Tower where the archaeological section of the Chełmno Land Museum is located, Dominican and Virgin Towers, where the seat of the Knight’s brotherhood of Chełmno is situated. Until today, the Grudziądz Gate, located on the eastern side of the city, has been preserved, thanks to the sacral function it has performed since the 17th century and partly the Merseburg Gate within the monastery complex. In the north-western part of the city, at the post-Cistercian monastery, the so-called Mestwin Tower is located. It comes from the second half of 13 century (raised at the turn of the 13th and 14th centuries) and most likely is a part of the former Teutonic residence.
Chrzanowski T., Kornecki M., Chełmno, Wrocław 1991.
Website icimss.edu.pl, Chełmno. Mury miejskie.