Tjølling and Kaupang were one of the oldest and biggest Viking settlements in Scandinavia. The Tjølling Church, built in the early 12th century, had a connection to the Viking trading centre and ancient Huseby farm. The church was damaged by fire in 1360 and rebuilt. A rare earthquake damaged it again in 1750s. The restoration took place in 1762-1767 and the appearance was modified to the Rococo style. The altarpiece and pulpit date from the 17th century.
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.