Medieval walls and towers Visby represent a city wall surrounding the city centre, located on the island of Gotland. Its height is 11 feet (approximately 3, 3 meters), and the total length reaches 3, 44 km, and was Originally built 29 of the lower towers and 22 of the upper towers, but today only 27 are left towers. Largely due to the existence of this city wall the city of Visby was inscribed on the world heritage list of UNESCO.

The oldest part of the wall is a defensive tower that now bears the name of the Powder. It was built at the entrance to the harbour town in the 1100s, for its defense - from the top of the tower crossbowmen was convenient in case of an attack to shoot down incoming in the harbour the boats. For 1270-1280-ies were built major fortifications around Visby.

The construction in the Middle ages, the walls and towers are often linked to the long conflict between the local authority and the Althingi (the national Assembly), which eventually led to the civil war on the island in 1288. Some of the oldest walls, located South of the extant towers were demolished during the war. The last major strengthening of the city walls was carried out at 1350-x, then their height was increased by 3-4 feet.

During the 1500's and early 1700's were also added niches to conduct a flank fire of the Eastern wall. By that time, the city wall ceases to play the role of a military facility and begins to act primarily as a customs point. The city wall was rebuilt in the years 1884-1886 under the guidance of architect Emil Victor Langlet.