Levänluhta is a swampy source known for mysterious prehistoric findings. According archaeological excavations about hundred people have been buried to the former lake of Levänluhta in the Iron Age. Archaeologists have also found several remains of bronze and silver jewelry and tools.
There are remains of buried children, elderly and animals of different ages. The human bones of Levänluhta are dated to the 300-700's. They are historically thought to be sacrificed human victims, but the site can also be an ancient cemetery for people died of starvation or diseases.
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.