The construction of brick town fortifications began in 1350 on the initiative of the Czech king Charles IV, who partially financed their cost. The completion of the work took place at the beginning of the 15th century. Later, in the years 1471-1497, an even smaller external wall was built with cylindrical low towers, which did not have only the eastern section of the Namysłów fortifications. They were probably deemed unnecessary there, because of the additional protection of the second trench existing there since 1428. Modernization of the walls was also carried out in the 16th and 17th centuries as well as in the first half of the 18th century. In the second half of the eighteenth and the nineteenth century, there was a gradual destruction and removal of old and unnecessary city fortifications. They were used to build new buildings next to them. A promenade was set up on the site of the former moat around the city.
Namysłów defensive walls were built of brick with a flemish bond, on some sections they had a stone foundations. The north and south walls were 1,70 meters thick, the walls on the east side were 2,20 meters thick. Their height was 6 meters. They were forty and several towers of various forms. To the town was led the western German Gate, also called Wrocław Gate or Brześć Gate, the eastern gate called Polish, Cracow or Kluczbork Gate, and the so-called Water Gate.
The main element of the fortifications preserved to this day is the Cracow Gate. Fragments of defensive walls with towers also have survived in the north-west and north-east part of the town. Interesting are the two arcaded culverts in the wall through which flows the branch of the river Widawa.
Pilch J, Leksykon zabytków architektury Górnego Śląska, Warszawa 2008.