Gundslev Church situated 1 km from the town Gundslev, because the village was moved in the 14th century. The church was founded pribably in the 12th century. It has a neat and harmonious appearance, and is constructed of red brick. The interior contains some early frecoes, dating probably from around 1300. They include depictions of the twelve apostles, in good condition, perhaps because they are likely to have offended Protestant sensibilities, and some less well preserved images of the Devil roaming around on earth.
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.