The construction of the city walls began just after Strzelin received town rights in 1292. The location documents were issued by Duke Bolko I of Świdnica who, to ensure the safety of the new town, ordered the construction. A moat was dug and Strzelin was surrounded by granite reinforced walls and ca. 10 towers. Three gates led into the city: the Wrocław Gate, the Water Gate (the plaque located at ul. Wodna informs about its former location) and Ziębice Gate (the spot where it stood is marked by colored cobbles at the intersection of Pocztowa and Kościuszki). Part of the walls were demolished during the expansion of the city in 1819, however, the greatest damage was made by the Red Army in 1945. The best preserved fragment of the walls are the Gunpowder Tower (ul. Staszica), next to the former brewery, and a piece of the wall near ul. Pocztowa.