The ruin of Wieladingen Castle lies about 90 metres above the Murg valley. The well-preserved ruin was structurally secured and the 20-meter castle keep was made accessible again with an external spiral staircase leading up to the observation platform with a panoramic panel of the Alps.
The castle wass built in the 12th century and documented first time in 1260.
In the 13th/14th century, the castle was inhabited by squires and knights of Wieladingen. They disappeared from the annals of history by the end of the 14th century.
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.