The Ramsberg Castle was built around 1200-1225 probably by the knight Ulrich von Plochingen and Konrad, the monk from Rechenberg. In 1327-1529 the castle was owned by the lords of Rechenberg. The Gothic chapel was built in 1560. It was initially dedicated to St. Margaret and later to St. Martin. Between 1560 and 1580 the castle was rebuilt a second time.
References: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.