Château de Gramont was first mentioned in 1329, belonging to the lords of Gramont. The medieval castle was destroyed in 1523 by the troops of Charles V of Spain and reuilt later with Renaissance additions. The gardens and terraces date from the 17th century.
In 1793 , the castle and its outbuildings were confiscated to the Nation and a military hospital was installed there for a few months. The building was empty when it was ravaged by fire in 1796.
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.