Gorgier Castle was first time mentioned in 1299. It was owned by the lords of Estavayer and Neuchâtel. The drawbridge, ditches, gardens and outbuildings date from the 16th century.
In the 19th century the castle become the home of rich merchants and industrialists. Following the successive works, the castle is decorated with an architecture combining medieval and Neo-Renaissance features.
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.