At the time of excavation of the foundations for the house of Palisade no. 14 in the early 1960s, the foundations of a circular building were shown to the right of the gate site. It could have been a gate-related defensive bastion or a water reservoir. The city walls were built of stone, the walls were 130-160 centimeters thick. According to Slovak historians, the medieval fortifications were built from the end of the 13th century to the middle of the 14th century. The surface of the walls was formed by battlements.
The threat of a Turkish invasion in the 16th century was the cause of the reconstruction of the walls by Italian specialists in building fortifications. Further changes were planned in the 17th century, but only changes were made to the castle fortifications. As the city’s inner fortifications slowed its growth, ditches were filled in and the city merged with the suburbs. At the beginning of the 19th century, the outer walls were demolished.
At present, only the Michalská Gate is preserved and a short, about 200 meters long section of the former walls near the Cathedral of St. Martin, which was renovated after a massive demolition under the castle in connection with the construction of the SNP bridge and its access road. At the same time, other sections of the fortification were uncovered.