Ehrenberg Castle dates from the early 12th century when it was built by the Counts of Lauffen. The oldest part of the wall around the main castle. The building of the main castle date from the 12th and 13th centuries. To existing keep dates from 1235. The castle was ruined in the Thirty Years' War. The new residential and farm buildings have been built in the 17th and 18th century. Today Ehrenberg is privately owned and can not be visited.
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.