Gars am Kamp Castle was built around 1120-1130. The heterogeneously arranged complex of the hilltop castle stands on terraced land descending in three levels by the Kamp River.
On the highest level stands the main castle, enclosed by a ring wall. On the second, middle plateau, there are the southern gate tower and the castle chapel, a hall building from the 16th century to the west, and the surrounding fortifications from the 13th century. On the third, lowest level, connected by a castle path, the fortified outer bailey hosts the parish church of Thunau am Kamp on a southern terrace. A small coat of arms stone of the Rotthal family (dated 1709) is located above the portal to the north tower.
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.