Medieval walls and towers of Visby is a city wall surrounding the center of the city, located on the island of Gotland. Its height is 11 feet (about 3, 3 meters), and the total length of up to 3, 44 km. It was originally built 29 towers and lower upper 22 towers, but today only 27 survived the towers. Largely due to the existence of the city wall of Visby town was listed as a UNESCO World Heritage Site.

The oldest part of the wall is a defensive tower, which now bears the name of the Powder. It was built at the entrance to the harbor of the city in 1100s for its defense - from the top of the tower arbaletchikov was convenient in case of attack to shoot down the incoming boats in the harbor. During the 1270-1280-ies were built by major fortifications around Visby.

The construction in the Middle Ages walls and towers are often associated with long-standing conflicts between the city government and the Althingi (People's Assembly), which eventually led to a civil war on the island in 1288. Some of the old wall, to the south of surviving today towers were demolished during the war. The last major strengthening of the walls was carried out in 1350's, but then their height was increased by 3-4 feet.

During the 1500s and early 1700s it was also added niches flanking fire for the conduct of the eastern wall. By the time the city wall no longer play the role of a military objective and begin to act primarily as a customs point. The city wall was rebuilt in the years 1884-1886 by the architect Emil Victor Langlet.