The history of Tibrandsholm is a mystery in Swedish history. The first written record date from 1402, when Margaret I of Denmark ordered to demolish it. The castle was probably owned by castle steward Tibrand. He belonged perhaps to Victual Brothers who fought against the Kalmar Union. In the 17th century during Swedish-Denmark wars Tibrandsholm was a soldier camp and execution place. There are also remains of Bronze, Iron and Viking Age settlements around Tibrandsholm.
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.