The ruins of the Hinterhaus Castle originate from the 12th century. The castle dates back to the time of Kuenringers rule when it served as a strategic stronghold. From here they were able to rule the entire Wachau valley. Touring the ruins with the famous Red Gate gives visitors a good impression of what medieval defence methods were like. The ruins still offers visitors a fantastic view of the Danube river even today.
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.