The castle of Villar Dora is a medieval feudal residence, among the best preserved of the Susa valley. It was built in the 13th century to the rocky hill which has been occupied since Roman times. The castle was renovated in Gothic style in the 14th century by Provana family. In the early 20th century, Count Antonielli d'Oulx carried out restoration works that returned the original medieval aspect to the central body of the castle.
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.