In the 16th century, the medieval town walls were replaced with new, longer, and stronger walls. The new walls covered the area of the present town centre and comprised corner towers, a fortress, and several small towers on the inner side. The walls were 1.90 meters thick and 6.60 meters high. It was possible to enter the town through the northern, southern, and eastern gates. Individual parts of the tower and walls are still partly preserved and visible. The ground plan of the tower and walls is shown on the pavement under today’s post office and on the road.