The Bollerup estate was first time mentioned in 1130. The castle was built in the end of 15th century. The present living quarters were built in the 1840s. It lies on an islet and is surrounded by a moat.
Bollerup has been owned by several families like Thott, Gjöe and Rantzau. Today it houses the Bollerup Agricultural Institute. Guided tours of the fort, grounds, stables and church are available during the summer.
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.