Plasencia City Walls were built in the late 12th century by Alfonso VIII of Castile, who founded Plasencia to protect his western border. The original perimeter was around 2.4 kilometers long. Towers with semicircular floors reinforced the walls and 26 of the original towers are still preserved. To visit the Wall of Plasencia visitors must stroll through the center of the old city and pass through any of the eight existing doors, gates and wickets. A walks through the barbican is an experience to enjoy.
Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.