Rollag Stave Church was probably originally built in second half of the 12th century, though not much is left of the original church. Originally, the church has been a simple church with a rectangular nave. It was first mentioned in written sources in 1425. It was rebuilt around 1660 into a cruciform church. Around 1760, an additional lining wall was placed on top of the structure and the church was extended to the west.
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.