Herblingen Castle in Stetten was probably built at the beginning of the 13th century by the Lords of Herblingen. In 1281 Konrad von Herblingen rebuilt the chapel, which may have been existed already in the 11th century. Herblingen family died out in the 15th century and after then castle owners changed many times.
The bank director Johann Wilhelm Gestefeld from Vienna acquired the castle in 1733 and converted it into a residence. By removing the battlements, drawbridge and ring wall he completely changed the appearance of the medieval castle. The trenches were also filled. The oldest existing part of the castle is probably the keep from the 13th 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.